Studies in sulfur heterocycles. Part 14.1 Application of heteroatom directed ortho-metallation in functionalisation of benzo[b]thiophene derivatives
作者:Sasanka Sekhar Mandal、Subhendu Sekhar Samanta、Chaitali Deb、Asish De
DOI:10.1039/a803427c
日期:——
Heteroatom directed ortho-metallation of 2-tert-butyldimethylsilyl-4-methoxybenzo[b]thiophene and 2-tert-butyldimethylsilyl-4-carbamoyloxybenzo[b]thiophene has been followed by quenching with electrophiles. Anionic ortho-Fries rearrangement has been carried out on 4-carbamoyloxybenzo[b]thiophene. The rearranged product has been used as the starting material in the synthesis of a novel linearly fused thienoisochromene.
对 2-叔丁基二甲基硅基-4-甲氧基苯并[b]噻吩和 2-叔丁基二甲基硅基-4-氨基甲酰氧基苯并[b]噻吩进行异位原子定向正金属化,然后用亲电体进行淬火。对 4-氨基甲酰氧基苯并[b]噻吩进行了阴离子正-弗里斯重排。重排产物被用作合成新型线性融合噻吩异色烯的起始原料。