conditions, N‐aminoalkylated 4‐silylated β‐sultams react to O‐silylated C‐4 aldol adducts 7, which are deprotected and desilylated to 8 and 10. The (α‐hydroxy‐α‐methylethyl)‐substituted β‐sultam 16 is prepared from 14 via 15. Reactions of 5b and 14 with aromatic aldehydes yield the Peterson olefination products 11, 12, and 19. E‐ and Z‐isomers of these compounds are separated by CC.
N-甲
硅烷基化β-
磺胺1和4在
氟离子存在下与酮和醛反应生成O-甲
硅烷基化
甲醇磺酰胺3。在类似条件下,N-
氨基烷基化4-甲
硅烷基化β-
磺胺反应生成O-甲
硅烷基化C-加杜尔酯4 7,将其脱保护并脱甲
硅烷基化为 8 和 10。(α-羟基-α-甲基乙基)-取代的 β-舒坦 16 由 14 经 15 制备。5b 和 14 与芳香醛反应产生 Peterson 烯化产物 11, 12 和 19。这些化合物的 E- 和 Z- 异构体由 CC 分隔。