Process for the preparation of thieno [3,2-c] pyridine and thien

Details Process for the preparation of thieno [3,2-c] pyridine and thien Process for the preparation of thieno [3,2-c] pyridine and thien

1975-06-25

1976-07-13

Rotman, Alan L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260329S, C07D21328

Patent

active

039693589

ABSTRACT:
The present invention relates to a process for the preparation of thieno[3,2-c]pyridine or thieno[2,3-c]pyridine, comprising cyclizing a N-(3-thienyl)-methyl-N-[ 2,2-(OR).sub.2 ]ethyl-para-toluene sulfonamide or a N-(2-thienyl)-methyl-N-[2,2-(OR).sub.2 ]ethyl-para-toluene sulfonamide, respectively, in which R is lower alkyl or both R groups form together a 2- or 3-membered alkylene radical, by treatment with an acid in the presence of an inert organic solvent.

REFERENCES:
patent: 3655681 (1972-04-01), Nakanishi et al.

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