Synthese neuer 1,6-Naphthyridine durch Aminomethin-ylierung von 1,4-Dihydropyridinen
作者:J. Kleinschroth、K. Mannhardt、J. Hartenstein、G. Satzinger
DOI:10.1055/s-1986-31807
日期:——
Synthesis of New 1,6-Naphthyridines by Aminomethinylation of 1,4-Dihydropyridines 1,4-Dihydropyridines (1a-h) react with s-triazine in the presence of base to give 1,4-dihydro-1,6-naphthyridinones (2a-h) in a single step in fair to good yields. The title compounds can also be prepared by reaction of 1,4-dihydropyridines with amidacetals followed by treatment of the aminomethylene intermediates (4) with ammonia.
通过 1,4-二氢吡啶的氨甲基化合成新的 1,6-萘啶 1,4-二氢吡啶(1a-h)在碱存在下与 s-三嗪反应,一步即可得到 1,4-二氢-1,6-萘啶酮(2a-h),收率尚可。标题化合物也可以通过 1,4-二氢吡啶与脒基乙醛反应,然后用氨处理氨基亚甲基中间体 (4) 来制备。