Ruthenium dioxide in fluoro acid medium: I. A new agent in the biaryl oxidative coupling. Application to the synthesis of non phenolic bisbenzocyclooctadiene lignan lactones.
作者:Y Landais、J.-P Robin、A Lebrun
DOI:10.1016/s0040-4020(01)80904-2
日期:——
very efficient agent for the oxidative coupling of non phenolic lignans and their derivatives, and this method was applied to the total synthesis of (+/-)-neoisostegane 2a and (+/-)-steganolide A 2b. This procedure was also used to obtain the first stereospecific synthesis of a cis-bisbenzocyclooctadiene lactone, the (+/-)-deoxyschizandrin 17, of which, was afforded by a short reduction sequence.
Le (trifluoroacétate) de ruthénium(IV), nouveau catalyseur a température ambiante du couplage biarylique oxydant non phénolique -première synthèse totale biomimétique du néoisostégane-
作者:Y Landais、J.-P Robin
DOI:10.1016/s0040-4039(00)84374-9
日期:1986.1
Synthesis of non-phenolic bisbenzocyclooctadiene lignan lactones and aporphinic alkaloids, by oxidative coupling with new agents in fluoro acid medium. IV.
作者:Denis Planchenault、Robert Dhal、Jean-Pierre Robin
DOI:10.1016/s0040-4020(01)87949-7
日期:1993.6
A systematic study of oxidants used in fluoro acid medium allowed us to increase notably the number of efficient reagents for the non-phenolic oxidativecoupling of lignan and alkaloid precursors. If dibenzylbutanolide had no methylenedioxyle group, Re2O7 and RuO2.2H2O were the most efficient. With a methylenedioxyle group, best results were obtained with Tl2O3, Mn(OAc)3.2H2O and Ce(OH)4. Finally,
对氟酸介质中使用的氧化剂的系统研究使我们显着增加了木脂素和生物碱前体的非酚类氧化偶联的有效试剂数量。如果二苄基丁醇化物不具有亚甲基二氧基,则Re 2 O 7和RuO 2 .2H 2 O是最有效的。使用亚甲基二氧基时,使用Tl 2 O 3,Mn(OAc)3 .2H 2 O和Ce(OH)4可获得最佳结果。最后,用Ce(OH)4,RuO 2 .2H 2 O和Fe(OH)(OAc)2以高收率获得了磷灰石。