A convenient synthesis of chiral 2-methylenebenzo[e][1,4]diazepin-5-ones via a one-pot reductive cyclodehydration with retention of chirality
作者:Kumaraswamy Sorra、Chin-Hung Lai、Chun-Yen Feng、Yang-Chang Wu、Srinivas Pusuluri、Khagga Mukkanti、Ta-Hsien Chuang
DOI:10.1016/j.tetlet.2016.09.060
日期:2016.10
key step, one-pot reductive cyclodehydration of the chiral 2-nitrophenyl-1,3-dicarbonyl compound, proceeds with >98% retention of configuration. This method represents a convenient approach to the synthesis of 2-methylenebenzo[e][1,4]diazepin-5-ones containing one chiral center. A series of benzo[e][1,4]diazepin-5-one derivatives have been successfully synthesized with retention of chirality by the one-pot
由1-脯氨酸完全合成了光学纯的(+)-富果聚糖素A,总产率为29%。关键步骤是手性2-硝基苯基-1,3-二羰基化合物的一锅还原环脱水,可进行> 98%的构型保留。该方法代表了一种合成具有一个手性中心的2-亚甲基苯并[ e ] [1,4]二氮杂庚酮-5-酮的简便方法。通过这项工作开发的一锅法反应,已成功合成了一系列苯并[ e ] [1,4]二氮杂庚酮-5-酮衍生物,并保持了手性。还提出了一种可能的还原环脱水机理。