Stereoselectivity in the sigmatropic rearrangement of eight- and nine-membered cyclic allylsulfonium ylides. synthesis of vinyl- substituted butyro- and valerolactones
作者:Fusao Kido、Subhash C. Sinha、Toshiya Abiko、Masataka Watanabe、Akira Yoshikoshi
DOI:10.1016/s0040-4020(01)85601-5
日期:1990.1
The rhodium (II) acetate-catalyzed [2,3]sigma-tropic rearrangement of the diazo malonates of ()-4-phen-ylthio-2-buten-l-ol derivatives 6 afforded vinyl-substituted butyrolactones 10 in a highly stereoselective manner, while the rearrangement of the diazo malonates of homologues, ()-5-phenylthio-3-penten-1-ol derivatives 9, yielded vinyl-substituted valerolactones 13 and 14 in the predominance of the