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Modular access to multi-substituted allenones via environmentally friendly organocatalytic C–H allenylation of aldehydes

Green Chem., 2024, Advance Article
DOI: 10.1039/D4GC04550E, Paper
Xinying Hu, Ayisenbati Jialingbieke, Yuzhi Ren, Yifan Yang, Donghui Wei, Jian Gao, Ding Du
Organocatalytic direct C–H allenylation of aldehydes with propargyl bromides has provided a straightforward and step-economical strategy for allenone modular synthesis.
To cite this article before page numbers are assigned, use the DOI form of citation above.
The content of this RSS Feed (c) The Royal Society of Chemistry




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Substrate-controlled regioselective hydrophosphorylation of allenes to enable photocatalytic synthesis of alkenylphosphoryl compounds

Green Chem., 2024, 26,11272-11279
DOI: 10.1039/D4GC03588G, Paper
Tian-Ming Yang, Xin-Lu Fan, Wei Shi, Xuefei Zhao, Xu-Hong Hu
A visible-light-induced hydrophosphorylation of allenes with H-phosphine oxides is demonstrated to give a diverse range of alkenylphosphoryl compounds in a highly stereoselective and regioselective manner.
The content of this RSS Feed (c) The Royal Society of Chemistry




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How Rang De Basanti created a challenging storyboard for future filmmakers

Rang De Basanti set a trend in filmmaking with its unconventional narrative style




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Royal Challengers ride on Kohli’s brilliance

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Royal Challengers: Allan Donald happy bowling is finally clicking



  • Indian Premier League

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Royal Challengers’ spectacular comeback continues

de Villiers and Iqbal Abdulla help the team make the final from a precarious 68 for six; a rare failure from Kohli



  • Indian Premier League


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McSweeney gearing up for 'unique' Bumrah challenge

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Facing challenge from nephew, Ajit Pawar says confident Baramatikars will keep his pride intact




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Old friends turn foes in Ambegaon as seven-time MLA Dilip Walse Patil faces stiff challenge from Devdutta Nikam




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INTERVIEW: PV Sindhu opens up about her coaching inspirations, new academy, and the challenges of age




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‘Ready for new challenge,’ says new Manchester United coach Ruben Amorim




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Tweaks in drug formulations to extend copyrights is a public health challenge




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Pratap Bhanu Mehta writes: India’s economic credibility challenge




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In Our Opinion: Trump in US is both a challenge and opportunity for India in climate negotiations




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Would-be president and foreign policy neophyte faces test north of the border




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Ongoing first quarter is challenging, says SBI Card CEO Hardayal Prasad

Expect ‘business as usual’ scenario returning from October; current operations at 60 per cent of pre-Covid levels




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Will Kansas City's challenging regular season schedule affect its chances to repeat as Super Bowl champions?

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Capital High School students in Helena, Montana, recognized during online ceremony as Grand Prize winner of EPA ‘See a Bloom, Give it Room’ high school video challenge

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EPA Recognizes University of Arizona and Arizona State University, Winners of Annual Campus RainWorks Challenge

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EPA Announces Winners of its Annual Campus RainWorks Challenge

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Immigration and Competitiveness: Responding to Global Challenges in the European Union and United States

Showcasing joint research by MPI and the European University Institute and funded by the European Commission, this event featured discussion on some of the most promising reform proposals on both sides of the Atlantic. Speakers discuss the project’s comparative research, which draws on MPI’s longstanding experience advising European and North American governments on immigration.




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Shared Challenges and Opportunities for EU and U.S. Immigration Policymakers

This final report summarizes and reflects upon the key findings of the Improving EU and U.S. Immigration Systems: Learning from Experience comparative research project undertaken by MPI and the European University Institute through a grant from the European Commission.




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Be strong for your families - Lady Allen sends message of strength in COVID-19 battle, urges women to fight on

Lady Allen – wife of Jamaica’s Governor General Sir Patrick Allen – says Jamaican women are among the strongest and most resilient in the world, and despite many bearing the full brunt of the coronavirus pandemic as breadwinners for their families...




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Securing Human Mobility in the Age of Risk: New Challenges for Travel, Migration, and Borders

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All at Sea: The Policy Challenges of Rescue, Interception, and Long-Term Response to Maritime Migration

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Integration Challenges and Opportunities in the Economic Development and Refugee Resettlement Arenas

Part of a series exploring recommendations likely to be addressed by the new National Integration Plan, this webinar, with perspectives from MPI, the WE Global Network, and Lutheran Immigrant and Refugee Services, examines the role of economic development initiatives and refugee resettlement programs/infrastructure in immigrant integration. 




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Integration Challenges and Opportunities in the Economic Development and Refugee Resettlement Arenas

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Border Security: Measuring the Progress and Addressing the Challenges

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Challenging the culture

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Peruvian congresswoman challenges coronavirus abortion regulations

Lima, Peru, May 9, 2020 / 02:00 pm (CNA).- Peruvian congresswoman Luz Milagros Cayguaray Gambini has demanded the country’s health minister provide the legal and scientific basis for a directive that would allow abortion when a pregnant woman is infected with the novel coronavirus.

Abortion is illegal in Peru except when pregnancy would cause death or permanent harm to a pregnant woman.

On April 22, Peru’s Minister of Health Victor Zamora issued a directive calling for provision of emergency contraception in the country, and allowing abortion for pregnant women who test positive for the coronavirus.

In a May 5 letter, Cayguaray demanded Zamora to “Indicate what the legal basis” is for the directive that allows doctors to “end the pregnancy,” if the mother has contracted COVID-19.

The legislator also challenged Zamora to indicate “the scientific and medical basis the norm is based upon.”

At issue is whether a positive test for coronavirus is sufficient to establish that a pregnancy threatens the life of a woman. Gambini says that assertion is unproven and unfounded.

Cayguaray has also written to Dr. Enrique Guevara Ríos, director of the country’s Perinatal Maternal Institute, asking him to report how many pregnant women with COVID-19 have been treated to date, “how many have had their pregnancies terminated,” “on what grounds,” and “what current regulation has been applied to carry out the interruption of those pregnancies.”

The Arequipa Doctors for Life Association has criticized the health directive in a statement.

"At this time in which all our efforts as a nation should be aimed at improving our precarious health system to mitigate the serious impact of the pandemic, the circumstances are being used to dictate measures that threaten the lives of Peruvians in their most vulnerable stage, life in the womb,” the group said.

Regarding the “morning after pill,” the group expressed surprise and concern “that the Ministry of Health promotes the irresponsible and reckless use of this drug in the general population and particularly for minors, and even worse, dispenses with obtaining the person’s medical history, which is an essential tool for the responsible practice of medicine, thus seriously exposing the users to danger."

Aborting a child because the mother has COVID-19, the doctors said “is contrary to the principles that govern medical practice, which must always be based on the application of therapies that are based on rigorous scientific studies and with respect to elementary ethical principles” which guide medical science in providing the best strategies to protect patients.

When a woman is pregnant “we have two patients to take care of, the mother and the unborn child," the doctors association stressed.

Concerning the babies themselves, five newborns whose mothers have COVID-19 were recently discharged from a government hospital in Peru. A sixth, also born of a coronavirus patient who is in serious condition in the intensive care unit, was born prematurely and remains hospitalized. None of the babies have tested positive for COVID-19.

In a May 5 interview with the El Comercio daily, Dr. César García Aste, who heads the hospital’s neonatology department, explained that there are strict protocols as to how the baby is to be fed in order to avoid infecting it.

A doctor from the hospital is assigned to follow up daily by phone on the baby’s condition for an average of 14 days, and “so far we haven’t had a problem with any of the five babies,” Garcia said.

 

A version of this story was first published by ACI Prensa, CNA's Spanish-language news agency. It has been translated and adapted by CNA.