Studies in sulfur heterocycles. Part 16. Use of 7-hydroxy-1-benzothiophene in the synthesis of substituted benzothiophene derivatives and tricyclic compounds incorporating a fused thiophene ring
RAHMAN, L. K. A.;SCROWSTON, R. M., J. CHEM. SOC. PERKIN TRANS., 1983, N 12, 2973-2977
作者:RAHMAN, L. K. A.、SCROWSTON, R. M.
DOI:——
日期:——
Rahman, Loay K. A.; Scrowston, Richard M., Journal of the Chemical Society. Perkin transactions I, 1983, # 12, p. 2973 - 2978
作者:Rahman, Loay K. A.、Scrowston, Richard M.
DOI:——
日期:——
Studies in sulfur heterocycles. Part 16. Use of 7-hydroxy-1-benzothiophene in the synthesis of substituted benzothiophene derivatives and tricyclic compounds incorporating a fused thiophene ring
作者:Sukhen Chandra Ghosh、Asish De
DOI:10.1039/a904605d
日期:——
Heteroatom directed ortho-metallation on N,N-diethyl-7-carbamoyloxy-1-benzothiophene, readily available from 7-hydroxy-1-benzothiophene enabled regioselective substitution in the 6-position. Both 7- and 4-hydroxy-1-benzothiophene were used in the annelation of 5- or 6-membered oxygen heterocycles onto the 1-benzothiophene molecule through sequential Claisen rearrangement–ring closure reactions. The nature of the annelated ring depends upon the reaction conditions.