作者:Anna Ananeva、Olga Bakulina、Dmitry Dar’in、Grigory Kantin、Mikhail Krasavin
DOI:10.3390/molecules27082469
日期:——
monomethyl ester of the respective dicarboxylic acid was involved in a reaction with imines promoted by acetic anhydride at an elevated temperature. Instead of the initially expected δ-lactam products of the Castagnoli-Cushman-type reaction, medicinally important 3-amino-2-azetidinones were obtained as the result of cyclization, involving a methylene group adjacent to an acid moiety. In contrast, replacing
相应二羧酸的N-(2-甲氧基-2-氧代乙基)-N-(苯磺酰基)甘氨酸单甲酯参与了与在升高的温度下由乙酸酐促进的亚胺的反应。代替最初预期的 Castagnoli-Cushman 型反应的 δ-内酰胺产物,作为环化的结果获得了药用上重要的 3-氨基-2-氮杂环丁酮,涉及与酸部分相邻的亚甲基。相反,在同一底物中用六氟异丙基代替醇残基会使另一个亚甲基(与酯部分相邻)对以 Castagnoli-Cushman 方式提供所需的 δ-内酰胺更具反应性。