The cheap and simple iPr-bisoxazolineâCu(OTf)2 proves to be an efficient catalyst in the asymmetric FriedelâCrafts reaction of indole with arylidene malonates. In iBuOH, the S-enantiomer was obtained in up to 97% ee, while the opposite enantiomer was obtained in up to 78% ee in CH2Cl2 or TTCE.
便宜且简单的 iPr-bisoxazoline–Cu(OTf)2 证明在
吲哚与芳基烯
丙烯酸酯的非对称 Friedel–Crafts 反应中是一种有效的催化剂。在 iBuOH 中,获得了高达 97% 的 S-对映体,而在
CH2Cl2 或
TTCE 中获得的相反对映体则高达 78% ee。