Studies on nucleoside analogs. XIX. Reaction of D-gluconyl isothiocyanate with diamines or enamines.
作者:HARUO OGURA、HIROSHI TAKAHASHI、KAZUYOSHI TAKEDA
DOI:10.1248/cpb.29.1832
日期:——
The reaction of phenylacetyl isothiocyanate (1a) with diamines afforded 1-substituted 3-phenylacetyl thiourea (3a-d) in good yields. Attempted ring closure of these products under thermal or basic conditions was unsuccessful. However, treatment of 3a with Ac2O-H3PO4 at room temperature gave the cyclized product (5a). Similar reaction of D-gluconyl isothiocyanate (1b) with o-phenylenediamine (2a) or diaminopyrimidines (2b, c, e, f) gave the D-gluco-pentyl benzotriazepine-2-thione (7a) or D-gluco-pentyl pyrimidotriazepine-2-thiones (7b, c, e, f), respectively, in fair yields. Treatment of 1b with ethyl 3-aminocrotonate or 6-amino-1, 3-dimethyluracil afforded D-gluco-pentyl thiopyrimidine (8b) or D-gluco-pentyl pyrimido [4, 5-d] pyrimidine (9b), respectively.
苯乙酰异硫氰酸酯(1a)与二胺反应,以良好产率得到了1-取代的3-苯乙酰基硫脲(3a-d)。尝试在这些产物中通过热条件或碱性条件进行环合反应未能成功。然而,3a在室温下经Ac2O-H3PO4处理得到了环合产物(5a)。D-葡糖酰异硫氰酸酯(1b)与邻苯二胺(2a)或二氨基嘧啶(2b, c, e, f)的类似反应分别以合理产率得到了D-葡糖五元苯并三氮杂环庚-2-硫酮(7a)或D-葡糖五元嘧啶并三氮杂环庚-2-硫酮(7b, c, e, f)。1b与乙基3-氨基巴豆酸酯或6-氨基-1,3-二甲基脲反应分别得到了D-葡糖五元硫嘧啶(8b)或D-葡糖五元嘧啶并[4,5-d]嘧啶(9b)。