Synthesis of Substituted 3-Hydroxy-2-Furanone Derivatives via an Unusual Enolate Wittig Rearrangement/Alkylative Cyclization Sequence
作者:Renata K. Everett、John P. Wolfe
DOI:10.1021/ol4009188
日期:2013.6.21
Treatment of methyl O-(alkynylmethyl) glycolate derivatives with dialkylboron triflates and Hünig’s base leads to the formation of highly substituted 3-hydroxy-2-furanone derivatives. The transformations appear to proceed via an unusual mechanism involving initial 2,3-Wittig rearrangement of a boron ester enolate followed by an alkylative cyclization reaction that leads to incorporation of an alkyl
INHIBITORS OF DIACYLGLYCEROL O-ACYLTRANSFERASE TYPE 1 ENZYME
申请人:Abbott Laboratories
公开号:EP2142552A1
公开(公告)日:2010-01-13
[EN] INHIBITORS OF DIACYLGLYCEROL O-ACYLTRANSFERASE TYPE 1 ENZYME<br/>[FR] INHIBITEURS D'ENZYME DIACYLGLYCÉROL O-ACYLTRANSFÉRASE DE TYPE 1
申请人:ABBOTT LAB
公开号:WO2008134690A1
公开(公告)日:2008-11-06
[EN] The present invention relates to compounds of formula (I): wherein R1, R2, and R3, are defined herein. Pharmaceutical compositions and methods for treating DGAT-1 related diseases or conditions are also disclosed. [FR] La présente invention concerne des composés de la formule (I) : dans laquelle R1, R2 et R3 sont définis ici. Des compositions pharmaceutiques et des procédés pour traiter des maladies ou des affections relatives à DGAT-1 sont également décrits.
Thiyl radical-mediated cyclization of ω-alkynyl O-tert-butyldiphenylsilyloximes
thiyl radical to the alkynyl group followed by radical cyclization of the corresponding vinyl radical onto the O-silyloxime moiety to give cyclic O-silylhydroxylamines in good yields. The reactivity of O-silyloximes in radical cyclization was similar to or even higher than that of O-benzyloximes. Facile removal of the silyl group of the cyclization products leading to hydroxylamines and nitrone formation