Synthesis of stilbene analogues by one-pot oxidation-Wittig and oxidation-Wittig–Heck reaction
作者:Akeel S. Saiyed、Krupa N. Patel、Bola V. Kamath、Ashutosh V. Bedekar
DOI:10.1016/j.tetlet.2012.06.090
日期:2012.8
Synthesis of symmetrical (and unsymmetrical) stilbene derivatives is achieved by a combination of one-pot steps of Kornblum type oxidation of benzyl halide, its simultaneous in situ formation of phosphonium salt, and subsequently their Wittig reaction. In other variant it is oxidized to aldehyde, treated with ylide generated from phosphonium salt (CH3PPh3X) to give styrene, and subjected to Pd catalyzed
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