Novel spiroborate esters derived from non-recemic 1,2-amino alcohols were examined as chiral catalyst in the borane reduction of acetophenone and other aromatic ketones at room temperature. The optically active alcohols were obtained in excellent chemical yields and up to 99% ee with less than 10% catalyst.
从非手性1,2-
氨基醇衍生的新型螺环
硼酸酯作为手性催化剂在室温下用于
苯乙酮和其他
芳香酮的
硼氢化还原反应。光学活性醇以极高的
化学产率获得,ee值高达99%,催化剂用量不到10%。