Microwave-Assisted Wittig Reaction of Semistabilized Nitro-Substituted Benzyltriphenyl-Phosphorous Ylides with Aldehydes in Phase-Transfer Conditions
作者:Tiago Rodrigues、Francisca Lopes、Rui Moreira
DOI:10.1080/00397911.2010.530378
日期:2012.3.1
Abstract We report here a simple entry into the nitrostilbene system in very short reaction times and good yields using the microwave-assisted Wittigreaction in phase-transfer conditions of nitro-substituted benzyltriphenylphosphonium ylides with aldehydes. GRAPHICAL ABSTRACT
The synthesis of non-symmetrical stilbene analogs of trans-resveratrol using the same Pd catalyst in a sequential double-Heck arylation of ethylene
作者:Sabrina M. Nobre、Mauro N. Muniz、Marcus Seferin、Wagner M. da Silva、Adriano L. Monteiro
DOI:10.1002/aoc.1756
日期:2011.4
developed a sequential and selective Pd‐catalyzed double‐Heck arylation of ethylene that results in non‐symmetrical nitro‐stilbeneanalogs of trans‐resveratrol at excellent yields. A catalytic system consisting of Pd(OAc)2 and P(o‐tolyl)3 permitted us to carry out the two consecutive Heck arylations without losing activity from the first to the second Heck reaction. After the first Heck arylation of ethylene