申请人:Nelson Research & Development Co.
公开号:US04880924A1
公开(公告)日:1989-11-14
This invention relates to a selective process for preparing bicyclic lactam-lactone compounds wherein the rings are fused, i.e. the rings share at least two carbon atoms, or are isolated. In particular, the present invention provides a process for selectively reacting novel 1-hydrocarbylamino (or heteroatom-substituted hydrocarbylamino); 1,1-dicarboxylic acid, alkylesters; 1-alkanolactonyl or hydrocarbyl (or heteroatom-substituted hydrocarbyl) alkanonylactonyl methane, as the salt of an acid having a pKa of 0 or more, to provide bicyclic lactam-lactone compounds. The selectively of the reaction to either fused or isolated bicyclic compounds is controlled by cyclizing the novel salts, in the absence of a base, a cyclizing said novel salts, in the presence of an amount of base substantially equivalent to said acid, respectively.
本发明涉及一种选择性制备双环内酰胺-内酯化合物的过程,其中环被融合,即环共享至少两个碳原子,或者是隔离的。特别地,本发明提供了一种选择性反应的过程,用于反应新颖的1-烷基氨基(或杂原子取代的烷基氨基);1,1-二羧酸,烷基酯;1-烷醇内酯基或烃基(或杂原子取代的烃基)烷酰内酯基甲烷,作为具有pKa值大于等于0的酸的盐,以提供双环内酰胺-内酯化合物。通过在无碱的情况下,环化新颖的盐,或在存在与所述酸基本质上相当的碱的情况下,环化所述新颖的盐,来控制反应的选择性,以得到融合或隔离的双环化合物。