Nickel-Catalyzed Stereoselective Arylboration of Unactivated Alkenes
作者:Kaitlyn M. Logan、Stephen R. Sardini、Sean D. White、M. Kevin Brown
DOI:10.1021/jacs.7b12160
日期:2018.1.10
A Ni-catalyzed method for arylboration is disclosed. The method allows for highly stereoselective arylboration of unactivated alkenes. The reactions utilize a simple Ni-catalyst and work with a broad range of alkenes and aryl bromides. The products represent useful intermediates for chemical synthesis due to the versatility of the C-B bond. Preliminary mechanistic details of the method are also disclosed
公开了一种用于芳基硼化的Ni催化方法。该方法允许未活化烯烃的高度立体选择性芳基硼化。该反应使用简单的 Ni 催化剂,并适用于广泛的烯烃和芳基溴化物。由于 CB 键的多功能性,这些产品代表了用于化学合成的有用中间体。还公开了该方法的初步机械细节。
Multicomponent Oxyalkylation of Styrenes Enabled by Hydrogen‐Bond‐Assisted Photoinduced Electron Transfer
Herein, we disclose a strategy for the activation of N‐(acyloxy)phthalimides towards photoinducedelectrontransfer through hydrogen bonding. This activation mode enables efficient access to C(sp3)‐centered radicals upon decarboxylation from bench‐stable and readily available substrates. Moreover, we demonstrate that the formed alkyl radicals can be successfully employed in a novel redox‐neutral method
Regioselective Vinylation of Remote Unactivated C(sp<sup>3</sup>)−H Bonds: Access to Complex Fluoroalkylated Alkenes
作者:Shuo Wu、Xinxin Wu、Dongping Wang、Chen Zhu
DOI:10.1002/anie.201812927
日期:2019.1.28
particular functional group into aliphatic sites by direct activation of unreactive C−H bonds is of great synthetic value. Despite advances in radical‐mediated functionalization of C(sp3)−H bonds by a hydrogen‐atom transfer process, the site‐selective vinylation of remote C(sp3)−H bonds still remains underexplored. Reported herein is a new protocol for the regioselective vinylation of unactivatedC(sp3)−H
4-hydroxy-benzopyran-2-ones and 4-hydroxy-cycloalkyl\x9bb!pyran-2-ones
申请人:Pharmacia & Upjohn Company
公开号:US05686486A1
公开(公告)日:1997-11-11
The present invention relates to compounds of formula I which are 4-hydroxy-benzopyran-2-ones and 4-hydroxy-cycloalkyl\x9bb!pyran-2-ones useful for inhibiting a retrovirus in a mammalian cell infected with said retrovirus. ##STR1## Wherein R.sub.10 and R.sub.20 taken together are: ##STR2##
Clean borrowing hydrogen methodology using hydrotalcite supported copper catalyst
作者:Manish Dixit、Manish Mishra、Pradyuman A. Joshi、Dinesh O. Shah
DOI:10.1016/j.catcom.2012.12.027
日期:2013.3
The catalytic activity of Mg–Al hydrotalcite supported copper catalyst was investigated for clean CC and CN bond forming reactions using alcohols as alkylating agent via borrowinghydrogenmethodology. The catalyst showed excellent conversion of ketone and amine substrates (71–99%) to alkylated products with high selectivity in alkylation reactions.