Toluene-4-sulfonic acid (R)-2',2'-dimethyl-2-phenyl-5'-(2,2,2-trifluoro-acetylamino)-[4,4']bi[[1,3]dioxanyl]-5-yl ester 在
sodium tetrahydroborate 作用下,
以
乙醇 为溶剂,
以89%的产率得到(4aR,5aR,8S,9aS,9bS)-2,2-Dimethyl-8-phenyl-hexahydro-bis[1,3]dioxino[5,4-b;4',5'-d]pyrrole