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Karnataka Health Minister meets ICMR chief, says KFD vaccine by 2026




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K'taka rain fury: Bengaluru worst hit; CM says 'closely monitoring rain-related disasters'




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Implementing Shakti free travel scheme difficult, but won't stop it: Karnataka Transport Minister




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Union Minister Kumaraswamy spotlights 'revolutionary changes' in India's health sector




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South Korean independence fighter's remains to return home after 105 years




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Hungary's Finance Minister submits 2025 'peace budget' amid recession concerns




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Brunei water village clean-up collects 1,300 kg of waste




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Situation will be different if I become Andhra's Home Minister: Pawan Kalyan




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Nominated posts filled after screening 30,000 applications: Chandrababu Naidu




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Gujarat govt appoints 123 veterinary officers to strengthen animal welfare




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Gujarat DDU-GKY Program: Over 30,000 rural youth trained, 450 receive job appointment letters




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Gujarat introduces stricter safety rules for boating activities




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PM Modi, Spanish counterpart to launch C-295 aircraft facility in Vadodara on Monday




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PM Modi, Spanish President Sanchez hold productive discussions, review bilateral cooperation across various sectors




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Seaplane tourism takes off in Kerala after first plane touches down




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Europa PIX: Maguire to Manchester United's rescue

IMAGES from the Europa League matches played on Thursday




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PIX: Inter-Juve in thrilling draw; Bayern, PSG win

Piotr Zielinski converted two penalties for Inter Milan as they played out a thrilling 4-4 draw with Juventus.




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PIX: Manchester United register big win!

United are six-times League Cup winners, most recently lifting the trophy in 2022-23 with Ten Hag at the helm.




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Champions League PIX: Inter down Arsenal; Barca win

IMAGES from the Champions League matches played on Wednesday.




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Israel rescues soccer fans attacked in Amsterdam

An eyewitness captured a video verified by Reuters showing a group of men running near Amsterdam central station, chasing and assaulting other men, as police sirens sounded.




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EPL PIX: United thrash Leicester; Ipswich stun Spurs

IMAGES from the English Premier League matches played on Sunday.




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PIX: Barcelona suffer shock defeat; Napoli hold Inter

Barcelona suffered a shock 1-0 LaLiga defeat at Real Sociedad on Sunday that ended their seven-match winning streak in all competitions.




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Full impact of tariff hike to flow through current quarter: Gopal Vittal

Vittal, Managing Director and Chief Executive Officer, Airtel, said there is room for further hikes as the average revenue per user levels in India were still much lower than in smaller countries in the region




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Cognizant reports 22% profit jump in Q3, bolstered by health sciences and financial services growth

Revenue also increased by 3% year-on-year, totalling $5 billion




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Satcom spectrum: TRAI sidestepped level field issue with terrestrial services, says Justice Nageswara Rao

His legal opinion, requested by Reliance Jio, highlights TRAI’s failure to invite stakeholder comments on the important issue of creating a level playing field between terrestrial access services and satellite communication networks




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C-DOT, IIT-Roorkee tie-up to develop millimeter wave transceiver for 5G rural connectivity

The project focuses on the development of millimeter wave backhaul technology in which only a small number of small cell-based stations are connected to the gateway through fibre




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OpenAI's ChatGPT back up after brief outage

Outage tracking website Downdetector.com said ChatGPT's services were down for about half an hour, affecting over 19,403 users as of 7:13 p.m. ET (0013 GMT on Saturday)




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AI agents more effective than GenAI for enterprise productivity: Deloitte study

The study says that GenAI use cases have mostly been limited to standalone applications




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Afternoon with a poet

Everyone was overjoyed when Mona athai won the prize for her short story. But they didn’t realise how one neighbour would react.




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Poet, writer, illustrator

He said fantasy is a necessary ingredient to living. And when you read his books, you will know why.




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Root of the matter

What forms words and their meanings?




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He met his Waterloo

In a bid to regain his power, Napoleon waged one last war. That was his final defeat. On July 15, 1815, he surrendered.




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Exploring the self-assembly dynamics of novel steroid–coumarin conjugates: a comprehensive spectroscopic and solid-state investigation

Org. Biomol. Chem., 2024, Advance Article
DOI: 10.1039/D4OB00192C, Paper
Open Access
Claudia M. Ramírez-Lozano, Ma. Eugenia Ochoa, Pablo Labra-Vázquez, Arturo Jiménez-Sánchez, Norberto Farfán, Rosa Santillan
The design, synthesis, and characterization of seven novel steroid–coumarin conjugates with diverse steroidal nuclei as lipophilic fluorescent materials for bioimaging applications are presented.
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Electrochemical selective divergent C–H chalcogenocyanation of N-heterocyclic scaffolds

Org. Biomol. Chem., 2024, Advance Article
DOI: 10.1039/D4OB00448E, Communication
Kusum Ucheniya, Pooja Kumari Jat, Amreen Chouhan, Lalit Yadav, Satpal Singh Badsara
An electrochemical direct selective C–H chalcogenocyanation approach for indolizine derivatives under mild conditions has been described.
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Coumarin–azasugar–benzyl conjugates as non-neurotoxic dual inhibitors of butyrylcholinesterase and cancer cell growth

Org. Biomol. Chem., 2024, Advance Article
DOI: 10.1039/D4OB00312H, Paper
I. Caroline Vaaland Holmgard, Aday González-Bakker, Eleonora Poeta, Adrián Puerta, Miguel X. Fernandes, Barbara Monti, José G. Fernández-Bolaños, José M. Padrón, Óscar López, Emil Lindbäck
Coumarin–azasugar–benzyl conjugates were obtained through the CuAAC reaction, displaying dual anti-Alzheimer and anti-cancer activity in vitro and no neurotoxicity.
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Metal- and light-free decarboxylative direct C–H alkylation of heteroarenes at room temperature

Org. Biomol. Chem., 2024, Advance Article
DOI: 10.1039/D4OB00187G, Paper
Tong-Bo Zhang, Xi-Dong Guan, Yan Gao, Shi-Chao Lu, Bing-Long Li
This study reports a metal- and light-free decarboxylative C–H alkylation of heteroarenes at room temperature.
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A water mediated multicomponent reaction for the synthesis of novel spirooxindole derivatives and their antifungal activity

Org. Biomol. Chem., 2024, Advance Article
DOI: 10.1039/D4OB00256C, Paper
Min Zhang, Liang Shi, Li Chen, Zhengyu Liu, Ting Zhao, Chunyin Zhu, Liuqing Yang
A total of 27 novel spirooxindoles were synthesized through a water mediated three-component reaction of isatin, 4-aminocoumarin, and 1,3-cyclodicarbonyl compounds. Several compounds showed excellent antifungal activity against Physalospora piricola.
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New 2-pyridone-based donor–acceptor dyes: the effect of the donor group position, type of π-linker and acid–base characteristics of the medium on the photophysical properties

Org. Biomol. Chem., 2024, Advance Article
DOI: 10.1039/D4OB00177J, Paper
Saveliy P. Sorokin, Mikhail Yu. Ievlev, Oleg V. Ershov
Synthesis of a series of new donor–acceptor dyes based on 2-pyridone and the study of the effect of the position of the donor group, the type of π-linker and the acid–base characteristics of the medium on their photophysical properties.
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Dehydrative alkynylation of 3-hydroxyisoindolinones with terminal alkynes for the synthesis of 3-alkynylated 3,3-disubstituted isoindolinones

Org. Biomol. Chem., 2024, Advance Article
DOI: 10.1039/D4OB00190G, Paper
Kai-Cheng Yang, Shi-Lu Zheng, Zhong Wen, Yu-Shan Zhang, Hai-Liang Ni, Long Chen
A HOTf or Fe(OTf)3-catalyzed dehydrative alkynylation of 3-hydroxyisoindolinones with terminal alkynes was developed, which represents a brand-new procedure for the synthesis of 3-alkynylated 3,3-disubstituted isoindolinones.
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Diastereoselective synthesis of functionalized spiroindolines via intramolecular ipso-iodocyclization/nucleophile addition cascade reactions of indole-tethered ynones

Org. Biomol. Chem., 2024, Advance Article
DOI: 10.1039/D4OB00112E, Paper
Debojyoti Bag, Sanghapal D. Sawant
Herein, we describe a highly diastereoselective approach for synthesizing polyfunctionalized spiroindolines from indolyl-ynones involving an ipso-iodocyclization/nucleophile addition cascade.
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On the mechanism of carboxylate elimination from carbohydrate monoester-derived radicals

Org. Biomol. Chem., 2024, Advance Article
DOI: 10.1039/D4OB00241E, Communication
Open Access
  This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Julia A. Turner, Hendrik Zipse, Mark S. Taylor
Computational analysis of the HAT-induced expulsion of carboxylic acids from monoacylated pyranosides implicates concerted elimination through a hydrogen-bonded transition state.
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Generation of sulfones utilizing β-sulfinyl esters as masked aryl sulfinates under redox-neutral conditions

Org. Biomol. Chem., 2024, Advance Article
DOI: 10.1039/D4OB00238E, Communication
Yixin Zhang, Zhu Yang, Hongjun Yang, Xuefeng Li, Lu Yang
A method for generation of SVI sulfones from β-sulfinyl esters (SIV) under transition-metal-free non-oxidative mild conditions is presented.
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Synthesis of fluorescent 5-heteroarylpyrimidine-containing oligonucleotides via post-synthetic trifluoromethyl conversion

Org. Biomol. Chem., 2024, Advance Article
DOI: 10.1039/D4OB00402G, Paper
Yuta Ito, Hisato Tanaka, Ayana Murakami, Yasufumi Fuchi, Yoshiyuki Hari
5-(Benzimidazol-2-yl)- and 5-(benzothiazol-2-yl)-pyrimidine bases-modified oligonucleotides were prepared by post-synthetic trifluoromethyl conversion and their fluorescence properties were measured.
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The synthesis of alk-2-ynl Weinreb amides via Pd/Cu-catalysed oxidative carbonylation of terminal alkynes

Org. Biomol. Chem., 2024, Advance Article
DOI: 10.1039/D4OB00290C, Paper
Bharati Mourya, Sandip T. Gadge, Bhalchandra M. Bhanage
Synthesis of alk-2-ynl-Weinreb amides via Pd-catalyzed oxidative carbonylation of terminal alkynes and N,O-dimethylhydroxylamine hydrochloride at room temperature under low CO/O2 pressure is reported for the first time.
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Asymmetric total synthesis of humulane sesquiterpenoids alashanoids B, C, E, and F and 2,9-humuladien-6-ol-8-one

Org. Biomol. Chem., 2024, Advance Article
DOI: 10.1039/D4OB00393D, Paper
Rasmita Barik, Samik Nanda
Naturally occurring sesquiterpenes having humulane frameworks are structurally intriguing and possess significant biological profiles.
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Stereoselective Synthesis of gem-Dihalopiperidines via Halo-Aza-Prins Cyclization Reaction: Access to Piperidin-4-ones and Pyridines

Org. Biomol. Chem., 2024, Accepted Manuscript
DOI: 10.1039/D4OB00338A, Paper
Anil Kumar Saikia, Surjya Kumar Bora, Subhamoy Biswas, Bipin Kumar Behera
An efficient methodology for the synthesis of 4,4-dihalopiperidine derivatives has been developed from N-(3-halobut-3-en-1-yl)-4-methylbenzenesulfonamide and aldehyde catalyzed by In(OTf)3 in excellent yields. The reaction involves an initial formation of six...
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Covalently linked thieno[2,3-b]thiophene-fullerene dimers: synthesis and physical characterization

Org. Biomol. Chem., 2024, 22,2978-2984
DOI: 10.1039/D4OB00027G, Paper
Abdulrahman M. Alazemi, Mohammad H. BinSabt, Hamad M. Al-Matar, Alan L. Balch, Mona A. Shalaby
Linked thieno[2,3-b]thiophene-fullerene Dimers.
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Vinylogous and stereoselective domino synthesis of pyrano[2,3-c]pyrroles from alkylidene meldrum's acids

Org. Biomol. Chem., 2024, 22,2948-2952
DOI: 10.1039/D4OB00233D, Communication
Mariia Savchuk, Giang Vo-Thanh, Sylvain Oudeyer, Hélène Beucher, Jean-François Brière
An expeditious diatereoselective synthesis of pyrano[2,3-c]pyrroles thanks to a domino Vinylogous aza-Michael-Aldol-Cyclocondensation (aza-VMAC) reaction to alkylidene Meldrum's acid derivatives.
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Hydrosilylation of nitriles and tertiary amides using a zinc precursor

Org. Biomol. Chem., 2024, 22,3053-3058
DOI: 10.1039/D4OB00161C, Paper
Ravi Kumar, Rohan Kumar Meher, Himadri Karmakar, Tarun K. Panda
A competent and selective hydrosilylation of nitriles and tertiary amides catalyzed by zinc bis(hexamethyldisilazide) [Zn(HMDS)2] under solvent-free and mild conditions are reported, as a sustainable and desirable alternative to existing methods.
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Unusual immunosuppressive pyridine-containing bisnor- (c23), tetranor- (c21) and pentanor- (c20) sesterterpenoids from Tibetan Leucosceptrum canum

Org. Biomol. Chem., 2024, 22,3019-3024
DOI: 10.1039/D4OB00334A, Paper
Man Li, Ling Feng, Han Zhang, Yan-Chun Liu, Ting-Ting Zhou, Yu Zheng, Kai Guo, Yan Liu, Sheng-Hong Li
Six unusual pyridine-containing bisnor- (C23), tetranor- (C21) and pentanor- (C20) sesterterpenoids were obtained from the medicinal plant Leucosceptrum canum of Tibetan origin. The immunosuppressive activities of these sesterterpenoids were observed.
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