Condensed furopyrimidine derivatives. Part III. Synthesis and psychotropic activity of pyrano[4′,3′∶4,5]furo[3,2-a]-1,2,4-triazolo-(tetrazolo)[4,3-a]pyrimidines
作者:G. K. Nalbandyan、A. P. Mkrtchyan、A. S. Noravyan、I. A. Dzhagatspanyan、G. G. Melikyan、R. S. Sukasyan
DOI:10.1007/bf02508110
日期:1999.2
Y:4,5] furo[2,3-d]i,3-thiazine (II). Boiling compound II with an aqueous potassium hydroxide solution is accompanied by the Dimroth rearrangement with the formation of condensed 6,6-dimethyl-2,4-dithio-5,6dihydro-8H-pyrano[4',Y:4,5] furo[2,3-d]-pyrimidine (III). This product is smoothly alkylated by methyl iodide in an ethanol solution of potassium hydroxide to yield pyranofuropyrimidine IV. The latter
亚美尼亚共和国国家科学院 Mndzhoyan 精细有机化学研究所,亚美尼亚埃里温。2-氨基-3-氰基呋喃吡喃 I 与二硫化碳在沸腾的吡啶中反应生成 6,6-二甲基-4-亚氨基-2硫代-5,6-二氢-8H-吡喃并[4',Y:4,5]呋喃[ 2,3-d]i,3-噻嗪 (II)。用氢氧化钾水溶液沸腾化合物 II 伴随着 Dimroth 重排,形成缩合的 6,6-二甲基-2,4-二硫基-5,6二氢-8H-吡喃并[4',Y:4,5]呋喃[2,3-d]-嘧啶 (III)。该产物在氢氧化钾的乙醇溶液中被碘甲烷顺利烷基化,得到吡喃呋喃嘧啶 IV。后一种化合物选择性地与水合肼相互作用(由于嘧啶环 [3] 的 4 位碳原子具有更高的反应性)形成单肼 V。最后,