Iron-catalyzed aerobic difunctionalization of alkenes: a highly efficient approach to construct oxindoles by C–S and C–C bond formation
作者:Tao Shen、Yizhi Yuan、Song Song、Ning Jiao
DOI:10.1039/c4cc00401a
日期:——
A novel iron-catalyzed efficient approach to construct sulfone-containing oxindoles, which play important roles in the structural library design and drug discovery, has been developed. The use of readily available benzenesulfinic acids, an inexpensive iron salt as the catalyst, and air as the oxidant makes this sulfur incorporation protocol very efficient and practical.
A new visible‐light photocatalytic arylsulfonylation and bicyclization of C(sp3)‐tethered 1,7‐enynes with sulfinic acids has been developed, delivering functionalized sulfone‐containing benzo[a]fluoren‐5‐ones with generally good yields. This Eosin Y‐catalyzed approach makes use of visible light as a safe and eco‐friendly energy source to drive cascade cyclization reactions, resulting in continuous
已开发出一种新的可见光光催化芳基磺酰化和C(sp 3)系的1,7-烯炔与亚磺酸的双环化,可提供官能化的含砜苯并[ a ]芴-5酮,且收率普遍良好。这种曙红Y催化方法利用可见光作为一种安全且生态友好的能源来驱动级联环化反应,从而导致连续的多个成键事件(包括C–S和C–C键)有效地构建多环连接的烷基芳基砜。
[EN] INDAZOLES<br/>[FR] INDAZOLES
申请人:GLAXOSMITHKLINE LLC
公开号:WO2011140325A1
公开(公告)日:2011-11-10
Herein are disclosed indazoles of formula (I) where the various groups are defined herein, and which are useful for treating cancer.
An environmentally benign protocol that affords propargylic sulfones containing highly congested carbon centers from easily accessible alcohols and sulfinic acids with water as the only byproduct is reported. The reaction proceeded via an in situ dehydrative cross-coupling process by taking advantage of the synergetic actions of multiple hydrogen bonds rather than relying on an external catalyst and/or
Water‐Promoted Dehydrative Tsuji–Trost Reaction of Non‐Derivatized Allylic Alcohols with Sulfinic Acids
作者:Jing Yu、Xueping Chang、Ruitian Ma、Qiuju Zhou、Mengmeng Wei、Xinhua Cao、Xiantao Ma
DOI:10.1002/ejoc.202001306
日期:2020.12.13
A promoting effect of water was observed, leading to the dehydrative synthesis of allylic sulfones byTsuji–Trost reaction of non‐derivatized allylic alcohols with sulfinicacids. Mechanism studies suggested the formation of the eight‐membered ring complex from allylic alcohols, sulfinicacids, and water through hydrogen bonding may be crucial to the efficient activation of allylic alcohols.