The Configuration of (+)-8-Ethylnorlobelol-I; a Correction of the Literature
作者:Sibel Mill、Alex Durant、Claude Hootelé
DOI:10.1002/jlac.199619961220
日期:1996.12
The piperidine alkaloid (+)-8-ethylnorlobelo-I is assigned the revised 2S,8,S absoluteconfiguration as depicted in 7. LiAl(O-tBu)3H reduction of the ketone rac-5 proceeded with a high stereoselectivity to give, after hydrolysis of the carbamate function, the syn amino alcohol rac-6. Inversion of the C-8 configuration of ent-6 yielded (-)-8-ethylnorlobelol-I ent-7. A short nitrone-alkene-based synthesis
哌啶生物碱(+)-8-乙基降落灵-1被指定为修订的2 S,8,S绝对构型,如图7所示。酮rac - 5的LiAl(O- t Bu)3 H还原具有较高的立体选择性,在氨基甲酸酯官能团水解后得到合成氨基醇rac - 6。ent - 6的C-8构型反转产生(-)-8-ethylnorlobelol-I ent - 7。短的基于硝烯-烯烃的rac - 7合成 已经被开发出来。