作者:Miguel Yus、Francisco Foubelo、José V Ferrández
DOI:10.1016/s0040-4020(03)00210-2
日期:2003.3
thiols 2 under acidic conditions leads to the corresponding seven-membered dibenzo heterocycles 5. In the case of thianthrene 1c, after addition of a carbonyl compound as the first electrophile [MeCHO, ButCHO, Me2CO, Et2CO, (CH2)5CO], the corresponding intermediate II can be lithiated again and react with a second electrophile. Diols 3 are obtained after hydrolysis when a carbonyl compound [ButCHO, PhCHO
在-90至-78的温度范围内,4-锂取代的4-杂取代的二苯并噻吩1(吩沙丁星,吩噻嗪和噻吩)与锂和催化量的4,4'-二叔丁基联苯(DTBB,7.5%摩尔)在锂中的锂化℃,得到相应的官能化有机锂中间体我,其通过与不同的亲电子反应[H 2 O,d 2 O,卜吨CHO,苯甲醛中,Ph(CH 2)2 CHO中,Me 2 CO,等2 CO,(CH 2)5一氧化碳,(CH 2)7CO]在相同温度下进行水解,得到预期的官能化硫醇2。一些硫醇2在酸性条件下的环化反应会导致相应的七元二苯并杂环5。在噻吨1c的情况下,在添加羰基化合物作为第一亲电子试剂后[MeCHO,But CHO,Me 2 CO,Et 2 CO,(CH 2)5 CO],相应的中间体II可以再次锂化并反应第二个亲电试剂。二醇3被水解时的羰基化合物[卜后得到吨CHO,苯甲醛中,Ph(CH2)2 CHO,Me 2 CO,Et 2 CO,(CH 2)5