The hydrosilylation of t-butyl (3R,5S)-3,5-isopropylidenedioxy-6-heptynoate with ClMe2SiH and a platinum catalyst, t-Bu3P·Pt(CH2=CHSiMe2)2O, gave an (E)-vinylsilane in high yield with high regioselectivity. A subsequent cross-coupling reaction with an aryl halide afforded t-butyl (3R,5S,6E)-7-aryl-3,5-isopropylidenedioxy-6-heptenoate. This sequence was applied to the synthesis of a potent HMG-CoA reductase inhibitor, NK-104.
用 ClMe2SiH 和
铂催化剂 t-Bu3P-Pt(
CH2=CHSiMe2)2O,对 (3R,5S)-3,5-异亚丙基二氧基-
6-庚炔酸叔丁酯进行氢
硅烷化反应,得到了具有高产率和高区域选择性的 (E)-
乙烯基硅烷。随后与芳基卤化物发生交叉偶联反应,得到了 (3R,5S,6E)-7-芳基-3,5-异亚丙基二氧基-
6-庚烯酸叔丁酯。该序列被用于合成一种强效
HMG-CoA 还原酶
抑制剂 NK-104。