7-ethyl 3-oxoheptanedioate. Alkylation of these β-keto diesters with a series of 2-nitrobenzyl bromides followed by acid hydrolysis and decarboxylation gives ethyl 6-(2-nitrophenyl)-4-oxohexanoates and ethyl 7-(2-nitrophenyl)-5-oxoheptanoates, respectively. Reductive amination under hydrogenation conditions followed by ester hydrolysis and condensative ring closure affords the final lactam products
摘要 标题为苯并稠合的角
三环酰胺3,3a,4,5-tetrahydropyrrolo-和2,
3,4,4a,5,6-hexahydro-1 H -pyrido [1,2- a ] quinolin-的新途径从1-(叔丁基)6-乙基
3-氧代己二酸酯和1-(叔丁基)-7-乙基
3-氧代庚二酸酯报告了1-酮。用一系列2-硝基苄基
溴将这些β-酮二酯烷基化,然后进行酸
水解和脱羧,分别得到6-(2-
硝基苯基)-4-氧
己酸乙酯和7-(2-
硝基苯基)-5-氧
庚酸乙酯。在氢化条件下进行还原胺化,然后进行酯
水解和缩合闭环,得到最终的内酰胺产物。反应进行得很干净,只需要进行两次色谱纯化。 标题为苯并稠合的角
三环酰胺3,3a,4,5-tetrahydropyrrolo-和2,
3,4,4a,5,6-hexahydro-1 H -pyrido [1,2- a ] quinolin-的新途径从1-(叔丁基)6-乙基3-氧代