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。