Synthesis of Arylethyl (E)-Styrylsulfones and Arylsulfones by One-Pot DIBAL-H/NaH-Mediated Reaction of β-Ketosulfones
摘要:
A facile one-pot synthetic route for preparing a series of arylethyl (E)-styrylsulfones or arylethyl arylsulfones is developed. The efficient one-pot DIBAL-H/NaH-mediated route includes reduction of -benzyl--arylketosulfones and retroaldol/aldol or retroaldol reaction of the resulting intermediate. The DIBAL-H/NaH-mediated reaction mechanism has been discussed.
Dioxygen-Triggered Oxosulfonylation/Sulfonylation of Terminal Olefins toward β-Keto Sulfones/Sulfones
作者:Yanjie Wang、Yuhan Zhao、Changqun Cai、Lingyun Wang、Hang Gong
DOI:10.1021/acs.orglett.1c03049
日期:2021.11.5
A dioxygen-triggered oxosulfonylation/sulfonylation of unactivated olefins to achieve β-keto sulfones/sulfones has been developed. Interestingly, pluralistic mechanisms were found when different types of compounds were applied as substrates, and different products were achieved. The reaction is carried out with a high atomic efficiency in the absence of a metal and a catalyst at room temperature under
biomimetic catalysts largely depending on their design. This protocol has been initially used to fabricate a biomimetic photocatalyst of single-atom iron site through coupling carbon nitride with hemin (CNH) for the visible light-promoted sulfonation of alkenes to produce β-ketosulfones with up to 94% yield. The experimental results show that the role of CN in CNH is concentrated on enhancing the separation
A Naphthalimide-Based ND-O-EAc Photocatalyst for Sulfonation of Alkenes to Access β-Ketosulfones Under Visible Light
作者:Xiaoting Yang、Jianjing Yang、Kelu Yan、Hongyun Qin、Wenjie Dong、Jiangwei Wen、Hua Wang
DOI:10.1002/ejoc.202000423
日期:2020.6.23
The development of facile, efficient, cost-effective, and visible light-driven photocatalysts for organic synthetic chemistry has received increasing attention. This protocol has initially synthesized a naphthalimide-basedND-O-EAcvisiblelightphotocatalyst for the sulfonation of alkenes to produce ketosulfones. Compared with the current photosynthetic strategies, the newly developed catalytic system
methodology for the construction of β-keto sulfones through visible-light induced direct oxysulfonylation of alkenes with sulfonic acids at ambient temperature under open-air conditions was developed. Most importantly, the reaction proceeded smoothly without the addition of any photocatalyst or strong oxidant, ultimately minimizing the production of chemical waste.
PURINE COMPOUNDS AND COMPOSITIONS AS KINASE INHIBITORS FOR THE TREATMENT OF PLASMODIUM RELATED DISEASES
申请人:Winzeler Elizabeth
公开号:US20100056494A1
公开(公告)日:2010-03-04
The invention provides a class of compounds, pharmaceutical compositions comprising such compounds and methods of using such compounds to treat or prevent diseases or disorders associated with kinase activity, particularly malaria.