Tetrabutylammonium bromide (TBAB) was found to be a highly effective catalyst at as low as 10 mol% for regioselective ring opening of a variety of N-tosylaziridines with various carboxylic acids to afford the corresponding ring-opening products (derived β-amino esters) in good to excellent yields and up to 100% regioselectivity in combination with DMF as the solvent.
发现
四丁基溴化铵(TBAB)是一种非常有效的催化剂,其低至10 mol%即可用于各种N-
甲苯磺酰
氮丙啶与各种
羧酸的区域选择性开环,从而提供相应的开环产物(衍生自β-
氨基酯)与
DMF一起使用时,具有良好至优异的收率和高达100%的区域选择性。