trithiocarbonic acid 1-cyano-1-methyl-3-[2-(pyridin-2-yldisulfanyl)ethylcarbamoyl]propyl ester ethyl ester 、 在
sodium carbonate 作用下,
以
甲醇 为溶剂,
以60%的产率得到(1
4S,3
3S,10E,12E,14R)-8
6-chloro-1
4-hydroxy-8
5,1
4-dimethoxy-3
3,2,7,10-tetramethyl-1
2,6-dioxo-7-aza-1(6,4)-oxazinana-3(2,3)-oxirana-8(1,3)-benzenacyclotetradecaphane-10,12-dien-4-yl 6-cyano-6,15,15,19,20-pentamethyl-9,18-dioxo-4-thioxo-3,5,13,14-tetrathia-10,19-diazahenicosan-21-oate