Retro-ene reactions in heterocyclic synthesis. v. a novel synthetic method for 1,3,5-triazine-2,4(1H,3H)-diones
作者:The Late Kunio Ito、Chiharu Sekiguchi、Asuka Wakai Hiroyuki Miida、Shogo Ihara
DOI:10.1002/jhet.5570440648
日期:2007.11
N-t-Butylamidines 1 on heating with diphenyl carbonate (2) at 150-180° gave the 1,3,5-triazine-2,4(1H,3H)-dione derivatives 5. Acylation of amidines 1 and cyclocondensation of the resulting carbamates 3 gave [1,3,5,7]tetrazocine-2,6-dione derivatives 4, and subsequent retro-ene reaction and ring contraction afforded triazine derivatives 5.
与碳酸二苯酯(2)在150-180°加热的N - t-丁基丁y 1,得到1,3,5-三嗪-2,4(1 H,3 H)-二酮衍生物5。am 1的酰化和所得氨基甲酸酯3的环缩合得到[1,3,5,7] tetrazocine-2,6-dione衍生物4,随后的逆烯反应和环收缩得到三嗪衍生物5。