Scandium Perchlorate as a Superior Lewis Acid for Regioselective Ring Opening of Aziridine Carboxylate with Indoles
作者:Minoru Isobe、Toshio Nishikawa、Shigeo Kajii、Kyoko Wada、Miyuki Ishikawa
DOI:10.1055/s-2002-33645
日期:——
acid-promoted coupling between indole and optically active serine-derived aziridine carboxylate is attractive because of the flexibility and convergence. Scandium perchlorate has been found to be a superior Lewis acid to the previously reported scandi- um triflate with respect to the yields as well as the regioselectivity of aziridine ring opening. The scope and limitation of this Lewis acid are also described
在光学活性色氨酸衍生物的合成中,Lewis 酸促进的吲哚和光学活性丝氨酸衍生的氮丙啶羧酸盐之间的偶联由于其灵活性和收敛性而具有吸引力。就收率和氮丙啶开环的区域选择性而言,已发现高氯酸钪是优于先前报道的三氟甲磺酸钪的路易斯酸。还描述了这种路易斯酸的范围和限制。