New isochromans. 1. Synthesis and antimicrobial activity of 4-substituted (±)-1<i>h</i>-spiro[benzo[<i>c</i>]pyran-3(4<i>H</i>), 1′-cyclohexane]-1-ones
作者:Milen G. Bogdanov、Mariana D. Palamareva、Blagovesta T. Gocheva、Darina B. Dimitrova
DOI:10.1002/jhet.5570440325
日期:2007.5
examined both in the presence of DMAP or BF3·Et2O complex as a catalyst. The latter yielded (±)-1-oxo-1H-spiro[benzo[c]pyran-3(4H), 1′-cyclohexane]-4-carboxylic acid (3) in a higher yield (82 %). A series of new (±)-4-(N,N-disubstituted-1-carbamoyl)-1H-spiro[benzo[c]pyran-3(4H),1′-cyclohexane]-1-ones (5a-h) were synthesized from the parent acid 3 by a two-step reaction. Differentiating microbial screening
在作为催化剂的DMAP或BF 3 ·Et 2 O络合物的存在下均检查了高邻苯二甲酸酐与环己酮之间的反应。后者以较高的产率(82%)产生了(±)-1-氧代-1 H-螺[苯并[ c ]吡喃-3(4 H),1'-环己烷] -4-羧酸(3)。一系列新的(±)-4-(N,N-二取代-1-氨基甲酰基)-1 H-螺[苯并[ c ]吡喃-3(4 H),1'-环己烷] -1-酮(5a -h)由母体酸3合成通过两步反应。对于大多数合成化合物,针对属于不同分类组的十二种微生物进行了区分微生物的筛选。螺酸3对所有MIC≥20μg / ml的枯草芽孢杆菌和寻常型毕赤酵母菌株均具有活性。大肠杆菌是对所测试化合物的抗菌作用最敏感的菌株。