Acetylenic chemistry: Part<b>15</b>[1]. Reactions of 1,2,3,4-Tetrahydro-2,4-dioxopyrido[2,3-<i>d</i>]pyrimidine with 3-bromoprop-1-yne
作者:J. Reisch、C. O. Usifoh []、J. O. Oluwadiya
DOI:10.1002/jhet.5570270232
日期:1990.2
Reaction of 1,2,3,4-tetrahydro-2,4-dioxopyrido[2,3-d]pyrimidine with 3-bromoprop-1-yne gave 1-prop-2′-ynylpyrido[2,3-d]pyrimidine-2,4-dione (4a), 3-prop-2′-ynylpyrido[2,3-d]pyrimidine-2,4-dione (4b), and 1,3-diprop-2′-ynylpyrido[2,3-d]pyrimidine-2,4-dione (4c). Subsequent boiling of 1,3-diprop-2′-ynylpyrido-[2,3-d]pyrimidine-2,4-dione (4c) in formic acid afforded 1-methylimidazo[1,2-a]pyridyl-N-prop-2′-ynylamide
1,2,3,4-四氢-2,4-二氧吡啶并[2,3- d ]嘧啶与3-溴丙-1-炔的反应生成了1-prop-2'-炔基吡啶并[2,3- d ]嘧啶-2,4-二酮(4a),3-prop-2'-炔基吡啶[2,3- d ]嘧啶-2,4-二酮(4b)和1,3-二丙-2'-炔基吡啶[2, 3 - d ]嘧啶-2,4-二酮(4c)。1,3-二丙酸-2'- ynylpyrido- [2,3-的后续沸腾d ]嘧啶-2,4-二酮(图4c中的甲酸),得到1 -甲基咪唑并[1,2一]吡啶基- ñ -丙-2'-乙酰胺(5)和1-丙酮-3 -prop-2'-炔基吡啶[2,3- d ]嘧啶-2,4-二酮(6)。