The chemistry of O-silylated ketene acetals: an efficientstereocontrolled synthesis of N-benzoyl L-daunosamine
作者:Yasuyuki Kita、Fumio Itoh、Osamu Tamura、Ya Yuan Ke、Yasumitsu Tamura
DOI:10.1016/s0040-4039(00)95946-x
日期:——
N-Benzoyl L-daunosamine was synthesized with high stereoselectivity utilizing a 1,3-addition of ketene silyl acetal (3a) to the chiral nitrone,(Z)-[(4R)-trans-2,2,5-trimethyl-1,3-dioxolan-4-yl]methylene[(1S)-1-phenylethyl]amine N-oxide (4c) accompanied by a silyl group-transfer in acetonitrile under mild conditions.
N-苄基L-柔红胺的合成是利用烯酮甲硅烷基缩醛(3a)向手性硝酮(Z)-[(4R)-trans-2,2,5-trimethyl-1的1,3-加成反应)高立体选择性地合成的,3-二氧戊环-4-基]亚甲基[(1S)-1-苯基乙基]胺N-氧化物(4c),在温和条件下在乙腈中进行甲硅烷基转移。