Easy α-alkylation of ketones with alcohols through a hydrogen autotransfer process catalyzed by RuCl2(DMSO)4
作者:Ricardo Martínez、Diego J. Ramón、Miguel Yus
DOI:10.1016/j.tet.2006.07.013
日期:2006.9
indicate that the process goes through the oxidation of the alcohols with ruthenium (after a previous deprotonation) to yield the corresponding aldehyde and a ruthenium hydride intermediate. In turn, the aldehyde suffers a classical aldol reaction with the starting ketone to form the corresponding α,β-unsaturated ketone, which finally is reduced through a Michael-typeaddition by the aforementioned ruthenium
1,4-Biradicals photogenerated from alkyl phenyl ketones have been trapped directly by hydrogen selenide before the biradicals undergo usual collapsing. Two hydrogen atoms are thus introduced into both radical sites. The rate constant for hydrogen abstraction of secondary carbon radicals from H2Se has been estimated to be greater than 1.6×108 M−1s−1.
[EN] AMINOPYRROLOTRIAZINES AS KINASE INHIBITORS<br/>[FR] AMINOPYRROLOTRIAZINES EN TANT QU'INHIBITEURS DE KINASE
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2019147782A1
公开(公告)日:2019-08-01
The disclosure relates to compounds of formula I which are useful as kinase modulators including RIPK1 modulation. The disclosure also provides methods of making and using the compounds for example in treatments related to necrosis or inflammation as well as other indications.
Chemoselective Tertiary C−H Hydroxylation for Late‐Stage Functionalization with Mn(PDP)/Chloroacetic Acid Catalysis
作者:Rachel K. Chambers、Jinpeng Zhao、Connor P. Delaney、M. Christina White
DOI:10.1002/adsc.201901472
日期:2020.1.23
oxidizing remote tertiary C(sp3)-Hbonds in the presence of a broad range of aromatic and heterocyclic moieties. Although catalyst loadings can be lowered to 0.1 mol% under a Mn(PDP)/acetic acid system for aromatic and non-basic nitrogen heterocycle substrates, the Mn(PDP)/chloroacetic acid system generally affords 10-15% higher isolated yields on these substrates and is uniquely effective for remote C(sp
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