A key cyclopentenolone intermediate in the asymmetric synthesis of alkaloids and seco-iridoids has been prepared from reaction of a chiral 5, 7-dioxoperhydro-1,4-oxazepine with a cyclopentene-1,2-dione dimer; the absolute configuration at the induced chiral centres has been assigned from n.O.e. experiments.
已从手性5、7-二氧杂氢-1,4-氧杂氮平与
环戊烯-1,2-二酮二聚体的反应中制备了
生物碱和癸二糖苷类化合物不对称合成中的关键
环戊烯酮中间体。诱导手性中心的绝对构型已由nOe实验确定。