Chloromethylvinyl alanes (E)-ClMeAl(CH=CHR) prepared directly from terminal alkynes undergo 1,4-addition to cyclohexenone and 3-methylcyclohexenone in moderate to good yield (30-70%) and good to excellent stereoselectivity (80-98% ee) using readily available copper(I) sources and chiral ligands.
直接从末端
炔烃制备的
氯甲基
乙烯基丙
氨酸(E)-ClMeAl(CH = CHR)以中等至良好的收率(30-70%)和良好至优异的立体选择性(80-98%)加到
环己烯酮和3-甲基
环己烯酮中ee)使用现成的
铜(I)来源和手性
配体。