A copper-catalyzed tandem process to generate chiral cyclobutene derivatives has been developed. It is based on an enantioselective conjugate addition or reduction of a cyclobutenone and sequential trapping with a chlorophosphate in a one-pot process. These phosphates are stable under mildly acidic conditions and serve as good electrophiles in Negishi coupling reactions.
已经开发了
铜催化的串联方法以产生手性
环丁烯衍
生物。它基于一锅法中
环丁烯酮的对映选择性共轭添加或还原,以及用
氯磷酸盐顺序捕集。这些
磷酸盐在弱酸性条件下稳定,在Negishi偶联反应中可作为良好的亲电子试剂。