Multiple pathways in the synthesis of new annelated analogues of 6-benzyl-1-(ethoxymethyl)-5-isopropyluracil (emivirine)
作者:Frans D. Therkelsen、Anne-Lene L. Hansen、Erik B. Pedersen、Claus Nielsen
DOI:10.1039/b303658h
日期:——
respectively. Annelated emivirine analogues 7-(3,5-dimethylphenyl)-1- ethoxymethyl-1,5,6,7-tetrahydrocyclopentapyrimidine-2,4-dione (4), 1-ethoxymethyl-5,5-dimethyl-8-phenyl-5,6,7,8-tetrahydro-1H-quinazoline- 2,4-dione (5) and 1-ethoxymethyl-5-methyl-7-phenyl-1,5,6,7- tetrahydrocyclopentapyrimidine-2,4-dione (6) were obtained in few steps from 12, 28 and 18a/33, respectively. These new analogues can be considered
3-(3,5-二甲基苯基)-2-氧代环戊烷甲酰胺(11)与草酰氯的缩合和2-苄基氨基-5-甲基-3-苯基环戊-1-烯甲酸乙酯(17a)与异硫氰酸三甲基甲硅烷基酯的缩合得到7-( 3,5-二甲基苯基)-6,7-二氢-5H-环戊[e] [1,3]恶嗪-2,4-二酮(12)和1-苄基-5-甲基-7-苯基-2-硫代氧杂分别为-1,2,3,5,6,7-六氢环戊嘧啶-4-酮(18a)。酸催化6-(4-甲基-1-苯基戊-3-烯基)-2-硫代氧2,3-二氢-1H-嘧啶-4-酮(26)的闭环和自由基介导的1的闭环,3-双(苄氧基甲基)-5-溴-6-(1-苯基丁-3-烯基)-1H-嘧啶-2,4-二酮(32a)得到5,5-二甲基-8-苯基-5,6 ,7,8-四氢-1H-喹唑啉-2,4-二酮(28)和1,3-双(苄氧基甲基)-5-甲基-7-苯基-1,5,6,7-四氢环戊嘧啶-2,4 -二酮(33)。退火的emivirine类似物7-(3