Triethylborane as an efficient promoter for palladium-catalyzed allylation of active methylene compounds with allyl alcohols
摘要:
Without prior activation of allyl alcohols, allylation of a variety of active methylene compounds with allyl alcohols proceeds smoothly at rt-50degreesC in the presence of catalytic amounts of Pd(OAc)(2) (1-10mol%), Et3B (30-240 mol%), a phosphine ligand (1-20 mol%), and a base (0 to 50-60 mol%). (C) 2003 Elsevier Ltd. All rights reserved.
Rhodium/Lewis Acid Catalyzed Regioselective Addition of 1,3-Dicarbonyl Compounds to Internal Alkynes
作者:Wei-Feng Zheng、Qiu-Jing Xu、Qiang Kang
DOI:10.1021/acs.organomet.7b00284
日期:2017.6.26
regioselective addition of 1,3-dicarbonyl compounds to internal alkynescatalyzed by rhodium/Lewisacid catalysts. The corresponding branched/linear allylic alkylation products could be selectively obtained in good yields. Rh–H species were considered to be generated by direct C–H oxidative addition of 1,3-dicarbonyl compounds with rhodium catalyst with the assistance of Lewisacid. Moreover, a retro-allylic