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

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

1977-12-13

1979-08-07

Rotman, Alan L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

424256, C07D49504

Patent

active

041638522

ABSTRACT:
This invention relates to a process for the preparation of tetrahydro-thieno[3,2-c]pyridine derivatives of the formula ##STR1## AND THEIR ISOMERIC TETRAHYDRO-THIENO[2,3-C]PYRIDINE DERIVATIVES IN WHICH R.sub.1 represents hydrogen, a lower alkyl or alkoxy radical, an aryl radical or an aralkyl radical; R.sub.2 and R.sub.3 represent hydrogen, halogen, a lower alkyl or alkoxy group, a di(loweralkyl)amino, nitro, cyano or acetamido group or, together with the phenyl nucleus to which they are attached, form a polycyclic aromatic ring, comprising reacting a tetrahydrothieno[3,2-c]pyridine derivative of the formula: ##STR2## OR A DERIVATIVE OF ITS ISOMER, TETRAHYDRO[2,3-C]PYRIDINE, WITH FORMALDEHYDE H-CHO and a phenol of the formula: ##STR3##

REFERENCES:
patent: 3969358 (1976-07-01), Amsalem
patent: 4051141 (1977-09-01), Castaigne
patent: 4065460 (1977-12-01), Heymes et al.

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