Transformations of enaminones. A simple one-pot synthesis of imidazolone derivatives

Transformations of enaminones. A simple one-pot synthesis of imidazolone derivatives
复制标题

DOI:
10.1016/j.tet.2011.11.013
复制
发表时间:
2012-01-14
期刊:
影响因子:
2.1
通讯作者:
Stanovnik, Branko
Stanovnik, Branko
中科院分区:
化学3区
文献类型:
--
作者:
Bezensek, Jure;Groselj, Uros;Stanovnik, Branko

文献摘要

被引文献

相似文献

乙酯(5-苯甲酰基-2-氧代-3-取代的-2,3-二氢-1H-咪唑-1-基)氨基甲酸酯7通过偶氮二甲酸二乙酯(3)与(E)-3-(三氟甲基)苯甲酰基氨基甲酸酯(3)的迈克尔加成反应制备。(E)和(Z)1-(二甲基氨基)-1-苯基丙-2-烯-1-酮(2)的混合物,随后用伯胺5a-n取代二甲基氨基,得到(E)和(Z)1-(二甲基氨基)-1-苯基丙-2-烯-1-酮(2)的混合物,(1-(取代的)氨基)-3-氧代-3-苯基丙-1-烯-2-基)肼-1,2-二甲酸酯(6a-n),然后环化,得到最终产物7a-n。分离并表征中间体6 i,并将其转化为7i。所有咪唑啉酮7a-n均以一锅法反应顺序合成,其中各个反应非常干净。(C)2011爱思唯尔有限公司保留所有权利。
Ethyl (5-benzoyl-2-oxo-3-substituted-2.3-dihydro-1H-imidazol-1-yl)carbamates 7 were prepared by the Michael addition of diethyl azodicarboxylate (3) to (E)-3-(dimethylamino)-1-phenylprop-2-en-1-one (2) followed by substitution of the dimethylamino group with primary amines 5a-n to afford a mixture of (E) and (Z) diethyl 1-(1-(substituted)amino)-3-oxo-3-phenylprop-1-en-2-yl)hydrazine-1,2-dicarboxylates (6a-n), followed by cyclization to give final products 7a-n. The intermediate 6i was isolated and characterized and transformed into 7i. All imidazolones 7a-n were synthesized in one pot reaction sequences with individual reactions being very clean. (C) 2011 Elsevier Ltd. All rights reserved.