Asymmetric Baeyer–Villiger reaction of symmetrical cyclobutanones 1a−j with urea−hydrogen peroxide (UHP) can be catalyzed by a complex of Pd(II) and the new terpene-derived P,N-ligand 7. The resulting lactones 2a−j were obtained in high yields and with good enantioselectivity (≤81% ee).
对称cyclobutanones的不对称拜尔-维利格反应1A - Ĵ与
脲-
过氧化氢(UHP)可以通过一个复杂的Pd(II)和新的萜
烯衍生的催化P,ñ -
配体7。得到的内
酯2a - j以高收率和良好的对映选择性(≤81%ee)获得。