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.
The total synthesis of deoxyschizandrin (1) and wuweizisu C (2) having natural configuration was accomplished and the thermal stability of biaryl configuration was confirmed.
Ruthenium(IV) (trifluoroacetate), a new oxidizing agent. II. A new access to schizandrins skeleton using biaryl oxidative coupling of -substituted butanolides