Potassium <i>tert</i>-Butoxide-Mediated Condensation Cascade Reaction: Transition Metal-Free Synthesis of Multisubstituted Aryl Indoles and Benzofurans
作者:Pengfei Yang、Weiyan Xu、Rongchao Wang、Min Zhang、Chunsong Xie、Xiaofei Zeng、Min Wang
DOI:10.1021/acs.orglett.9b01093
日期:2019.5.17
tert-butoxide-mediated condensation reactioninvolving a vinyl sulfoxide intermediate. Products are obtained from N- or O-benzyl benzaldehydes using dimethyl sulfoxide as a carbon source. The methodology features a wide functional group tolerance and transition metal-free environment. Preliminary mechanistic studies suggest that the reactioninvolves a tandem aldol reaction/Michaeladdition/dehydrosulfenylation/isomerization
Synthesis and evaluation of oxime derivatives as modulators for amyloid beta-induced mitochondrial dysfunction
作者:Young Seub Kim、Sun hwa Jung、Beoung-Geon Park、Min Kyung Ko、Hyun-Seo Jang、Kihang Choi、Ja-Hyun Baik、Jiyoun Lee、Jae Kyun Lee、Ae Nim Pae、Yong Seo Cho、Sun-Joon Min
DOI:10.1016/j.ejmech.2012.12.033
日期:2013.4
Starting from quinuclidinyl oxime 1 identified by preliminary screening, a series of azacycles-containing oxime derivatives was synthesized. Their mPTP blocking activities were evaluated by a JC-1 assay, measuring the change of mitochondrial membrane potential. The inhibitory activity of nine compounds against amyloid beta-induced mPTP opening was comparable or even superior to that of piracetam. Among them, 12d effectively maintained mitochondrial function and cell viabilities on the ATP assay, the MTT assay, and the ROS assay. In addition, it exhibited favorable in vitro stability and pharmacokinetic characteristics, which hold a promise for further development of AD therapeutics. (C) 2012 Elsevier Masson SAS. All rights reserved.