The palladium-catalyzed desilylation-arylation of substituted vinylsilanes by p-iodoanisole in the presence of bidentate phosphine ligands is described. Apart from enhancing the rate of the reaction considerably, heteroatom-based functional groups in the vinylsilane moiety have a profound influence on the regiochemistry. A catalytic cycle for the chelation-controlled desilylation-arylation reaction
<i>N</i>-Methyl Allylic Amines from Allylic Alcohols by Mitsunobu Substitution Using <i>N</i>-Boc Ethyl Oxamate
作者:Branca C. van Veen、Steven M. Wales、Jonathan Clayden
DOI:10.1021/acs.joc.1c00918
日期:2021.6.18
synthesis of a range of N-methyl allylicamines. Primary and secondary allylic alcohols underwent a regioselective Mitsunobu reaction with readily accessible N-Boc ethyl oxamate to deliver the corresponding N-Boc allylicamines, including in enantiopure form via stereospecific substitution. Subsequent N-methylation and Boc deprotection without chromatography yielded the amine products as hydrochloride salts
Hydantoin derivatives as inhibitors of tumor necrosis factor-alpha converting enzyme (TACE)
申请人:——
公开号:US20040254231A1
公开(公告)日:2004-12-16
The present invention provides compounds of Formula (I):
1
or a stereoisomer or pharmaceutically acceptable salt form thereof, wherein the variables L, Z
0
, R
1
, R
4
, R
5
, and R
11
are defined are as defined herein, which are useful as inhibitors of matrix metalloproteinases (MMP), TNF-&agr; converting enzyme (TACE), aggrecanase, or a combination thereof.