(4S)-5,5-dimethyl-2t-(Lr-1tF,2cF,3rF,4-tetraacetoxy-but-catF-yl)-thiazolidine-4r-carboxylic acid 在
吡啶 、
甲基磺酰氯 作用下,
生成 (5a
S)-1,1,6,6-tetramethyl-3
c,8
c-bis-(
Lr-1
tF,2
cF,3
rF,4-tetraacetoxy-but-
catF-yl)-(5a
r,10a
c)-tetrahydro-bisthiazolo[3,4-
a;3',4'-
d]pyrazine-5,10-dione