Diastereoselective Synthesis of (<i>Z</i>)-6-(2-Oxo-1,2-dihydro-3<i>H</i>-indol-3-ylidene)-3,3a,9,9a-tetrahydroimidazo[4,5-<i>e</i>]thiazolo[3,2-<i>b</i>]-1,2,4-triazin-2,7(1<i>H</i>,6<i>H</i>)-diones
作者:Galina A. Gazieva、Ekaterina A. Shishkova、Ludmila B. Kulikova、Natal'ya G. Kolotyrkina、Natal'ya V. Sigay、Angelina N. Kravchenko
DOI:10.1002/jhet.2008
日期:2014.7
Two efficient and diastereoselective procedures for the synthesis of (Z)‐6‐(2‐oxo‐1,2‐dihydro‐3H‐indol‐3‐ylidene)‐3,3a,9,9a‐tetrahydroimidazo[4,5‐e]thiazolo[3,2‐b]‐1,2,4‐triazin‐2,7(1H,6H)‐diones by aldol‐crotonic condensation of 1,3‐dimethyl‐3a,9a‐diphenyl‐3,3a,9,9a‐tetrahydroimidazo[4,5‐e]thiazolo[3,2‐b]‐1,2,4‐triazin‐2,7(1H,6H)‐dione with isatins under acidic or basic catalysis are reported. Isomerization
合成(Z)-6-(2-氧代-1,2-二氢-3 H-吲哚-3-亚烷基)-3,3a,9,9a-四氢咪唑的两种有效且非对映选择性的方法[4,5- e ] thiazolo [3,2 - b ] -1,2,4-三嗪-2,7 (1 H,6 H)-二酮通过1,3-二甲基-3a,9a-二苯基-3的羟醛-巴豆酸缩合反应,3a,9,9a-四氢咪唑并[4,5- e ]噻唑并[3,2 - b ] -1,2,4-三嗪-2,7 (1 H,6 H)-二酮与靛红在酸性或碱性条件下有催化作用的报道。(Z)-7-(1-烯丙基-2-氧代-1,2-二氢-3 H-吲哚-3-亚烷基)-1,3-二甲基-3a,9a-二苯基-1,3a,4的异构化,9a-四氢咪唑[4,5-在基本条件下观察到e ] thiazolo [2,3 - c ] -1,2,4-三嗪-2,8(3 H,7 H)-dione。