Rapid Approach to 3,5-Disubstituted 1,4-Benzodiazepines via the Photo-Fries Rearrangement of Anilides
作者:Serena Ferrini、Fabio Ponticelli、Maurizio Taddei
DOI:10.1021/jo0614442
日期:2006.11.1
structures predominantly active in the central nervous system. The same results were obtained by coupling with N-Cbz-protected α-amino acids followed by microwave assisted hydrogenolysis. When the Fries rearrangement was carried out on the anilide derived from N-Boc−Ala−OH and the further coupling done with N-Cbz−(OMe)Asp−OH, the formed benzodiazepines could be inserted in a peptide chain for the preparation
衍生自羧酸和取代的苯胺的不同的苯甲酸酯已在与R 1上存在酸不稳定基团(例如N-Boc或TBDMSO)兼容的条件下,进行了光化学诱导的Fries重排,得到了相应的邻氨基苯甲酮。和R 3。这些化合物不易以其他方式获得,是制备苯并缩合杂环的有用组成部分。与N-Boc氨基酸偶联并由TFA介导的脱保护后,产物环化为相应的3,5-二取代的1,4-苯并二氮杂-2-酮,这些特权结构主要在中枢神经系统中起作用。通过与N-Cbz保护的α-氨基酸偶联,然后进行微波辅助的氢解,可获得相同的结果。当对源自N-Boc-Ala-OH的苯胺进行Fries重排并与N-Cbz-(OMe)Asp-OH进行进一步偶联时,可以将形成的苯并二氮杂苯插入肽链中以制备N-Boc-Ala-OH。构象受限的拟肽。