作者:Adel Nefzi、Nhi A Ong、Richard A Houghten
DOI:10.1016/s0040-4039(01)00939-x
日期:2001.7
strategy for the parallel solid-phase synthesis of 4,5-dihydro-1H-1,4-benzodiazepine-2,3-diones is described. The reductive alkylation of resin-bound primary amine with different substituted o-nitrobenzaldehydes generated a secondary amine, which was treated further with methyl chlorooxoacetate. The nitro group was reduced with tin(II) chloride. During the overnight reduction, an in situ intramolecular cyclization
描述了4,5-二氢-1 H -1,4-苯并二氮杂-2,3-二酮平行固相合成的有效策略。用不同的取代的邻硝基苯甲醛将树脂结合的伯胺还原烷基化,生成仲胺,将其进一步用氯氧乙酸甲酯处理。硝基用氯化锡(II)还原。在过夜还原期间,发生原位分子内环化,以在HF裂解后提供所需的4,5-二氢-1 H -1,4-苯并二氮杂-2,3-二酮。