(â)-(S)-Nakinadine B has been synthesized for the first time (in 9 steps and 17% overall yield from commercially available atropic acid) using the conjugate addition of lithium dibenzyl-amide to an N-α-phenylacryloyl SuperQuat derivative with in situ diastereoselective enolate protonation as the key step.
(â)-(S)-Nakinadine B首次被合成(经过9步反应,整体产率为17%,以商业可得的阿
托品酸为起始材料),该合成采用了将
锂二苄基胺与N-α-苯基
丙烯酰超季
铵衍
生物进行共轭加成的方式,其中原位的非对映选择性烯酸质子化是关键步骤。