1,3-Dioxan-5-yl diazoacetates undergo conformation dependent oxonium ylide generation catalyzed by chiral dirhodium(II) carboxamidates, and Stevens rearrangement product(s) are formed with high chemoselectivity and with enantioselectivities reaching 88% ee.
                                    1,3-
二恶烷-5-基
重氮乙酸酯受到手性
氨基甲酸酯(II)
氨基甲酸酯催化的构象依赖性氧鎓叶立德生成,并且史蒂文斯重排产物以高的
化学选择性和对映选择性达到88%ee形成。