Deacylative Allylation of Nitroalkanes: Unsymmetric Bisallylation by a Three-Component Coupling
作者:Alexander J. Grenning、Jon A. Tunge
DOI:10.1002/anie.201006273
日期:2011.2.11
Use it and lose it! Allylic alcohols were used directly for the synthesis of diallylated nitroalkanes in a three‐component coupling based on the strategy of deacylativeallylation for the in situ generation of a nucleophile and an allyl electrophile (see scheme).
Deacylative Allylation: Allylic Alkylation via Retro-Claisen Activation
作者:Alexander J. Grenning、Jon A. Tunge
DOI:10.1021/ja205717f
日期:2011.9.21
"deacylative allylation", the coupling partners, an allylic alcohol and a ketone pronucleophile, undergo in situ retro-Claisen activation to generate an allylic acetate and a carbanion. In the presence of palladium, these reactive intermediates undergo catalytic coupling to form a new C-C bond. In comparison to unimolecular decarboxylative allylation, a commonly utilized method for allylation of carbon
本文描述了多种相对不稳定的碳亲核试剂的烯丙基烷基化的新方法。在这个“脱酰基烯丙基化”过程中,偶联伙伴,烯丙醇和酮亲核试剂,进行原位逆克莱森活化以生成烯丙乙酸和碳负离子。在钯的存在下,这些反应性中间体进行催化偶联形成新的 CC 键。与单分子脱羧烯丙基化(一种常用的碳阴离子烯丙基化方法)相比,脱酰基烯丙基化是一种分子间过程。此外,脱酰基烯丙基化允许容易获得的烯丙醇直接偶联。最后,通过快速构建多种 1、
Co-Immobilization of a Palladium-Bisphosphine Complex and Strong Organic Base on a Silica Surface for Heterogeneous Synergistic Catalysis
作者:Ken Motokura、Koki Saitoh、Hiroto Noda、Yohei Uemura、Wang-Jae Chun、Akimitsu Miyaji、Sho Yamaguchi、Toshihide Baba
DOI:10.1002/cctc.201501178
日期:2016.1
palladium–bisphosphine complex and a strong organic base, 1,4‐diazabicyclo[2.2.2]octane (DABCO), on a silica support was successfully achieved. The new catalyst structure was characterized by X‐ray photoelectron spectroscopy, solid‐state NMR spectroscopy, X‐ray absorption fine structure spectroscopy, and elemental analysis. Although the local structure of the Pd–bisphosphine complex was unaffected by the