A procedure for the obtaining of derivatives of 9,10-dihydro-4h-benzo (4,5) ciclohepta (1,2-b) thiophene. (Machine-translation by Google Translate, not legally binding)

摘要

Process for obtaining derivatives of 9,10-dihydro-4H-benzo [4,5] cyclohepta [1,2-b] thiophene of general formula I ** (See formula) ** wherein R1 signifies a hydrogen atom or the methyl radical, R2 a hydrogen atom, R3 a lower alkyl radical, R4 a hydrogen atom or a lower alkyl radical, or R3 and R4 together with the nitrogen atom means the 1-pyrrolidinyl radical, piperidino or a 4- (lower alkyl) -piperazinyl radical, or R 3 with R 1, together, the di- or trimethylenic radical, or with R 2, together, the tri-0 tetramethylene radical, the other being the symbols R1 and R2 by a hydrogen atom, characterized in that a derivative of 9,10-dihydro-4H-benzo- [4,5] cyclohepta [1,2-b] thiophene of general formula II ** (See formula) ** where R1, R2, R3, and R4 have the meaning above, are reduced with hydroiodic acid and red phosphorus under heating. (Machine-translation by Google Translate, not legally binding)