Dibenzothiepins, phthalans and phthalides from 4-heterosubstituted dibenzothiins
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