Synthesis of 1,2,3,4-tetrahydropyrido- [2,3-b]pyrazine-2,3-dione derivatives with a chiral substituent at the nitrogen atom
作者:A. V. Kurkin、K. V. Bukhryakov、M. A. Yurovskaya
DOI:10.1007/s10593-009-0249-z
日期:2009.2
phenylalanine, reduction of the nitro group, acylation with ethyl oxalyl chloride, and intramolecular cyclization, leads to the synthesis of derivatives of 1,2,3,4-tetrahydropyrido[2,3-b]pyrazine-2,3-dione with a chiral substituent at the nitrogen atom. It was established that, depending on the conditions of carrying out the cyclization, the parallel formation of derivatives of imidazo[4,5-b]pyridine is possible
包括光活性苯基丙
氨酸的酯的2-
氯-3-
硝基吡啶中的
氯原子的亲核取代,硝基的还原,与乙基
草酰氯的酰化作用以及分子内环化的步骤顺序导致合成1的衍
生物,在氮原子上具有手性取代基的,2,3,4-四氢
吡啶并[2,3- b ]
吡嗪-2,3-二酮。已经确定,取决于进行环化的条件,
咪唑并[4,5- b ]
吡啶的衍
生物的平行形成是可能的。发现仅在
吡嗪或
咪唑的结构与
吡啶缩合的条件下选择性进行环化的条件。