The reaction of 2,5-dihydro-1H-phosphole 1-oxide 1 with ArB(pin) 3 in the presence of a chiral (R)-segphos–rhodium catalyst under highly basic conditions (10 equiv of KOH) gave high yields of (1S,3S)-3-arylphospholane 1-oxide 4 with high diastereoselectivity as well as high enantioselectivity. Equilibration of 1 with its 2,3-dihydro isomer 2, which is chiral and racemic, by base-catalyzed olefin isomerization
在高碱性条件(10当量的KOH)下,在手性(R)-segphos-
铑催化剂的存在下,2,5-二
氢-1 H-
磷化氢1-
氧化物1与ArB(pin)3的反应产生了高收率高非对映选择性和高对映选择性的(1 S,3 S)-3-芳基膦烷1-
氧化物4的合成。通过碱催化的
烯烃异构化使1与2,3-二
氢异构体2(手性和外消旋)平衡,然后用手性
铑催化剂进行2的动力学拆分,实现了目前的动态动力学拆分。