Optically active 1,3-dioxolan-2-yl cation intermediates were generated during enantioselective dioxyacetylation of alkene with chiral hypervalent iodine(III). Regioselective attack of a nucleophile toward the intermediate resulted in reversal of enantioselectivity of the dioxyacetylation.
用手性高价
碘(III)对烯烃进行对映选择性二氧乙酰化时,生成了旋光的1,3-二氧杂戊-2-基阳离子中间体。亲核试剂对中间体的区域选择性攻击导致二氧乙酰化的对映选择性逆转。