Process for the synthesis of 5-amino tetrazole derivatives

Details Process for the synthesis of 5-amino tetrazole derivatives Process for the synthesis of 5-amino tetrazole derivatives

1994-12-19

1997-03-04

Springer, David B.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549 51, 549 54, 549 57, C07D40912

Patent

active

056080743

ABSTRACT:
An improved process for the preparation of 3-chlorobenzo[b]thiophene-2-carbonyl chlorides is described where a cinnamic acid is converted in the presence of thionyl chloride and a 4-N,N'-disubstituted aminopyridine in one step to the desired product.

REFERENCES:
Journal of Heterocyclic Chemistry, vol. 23, No. 5, Sep. 1986, pp. 1571-1577.
Liebigs Annalen der Chemie, No. 9, Sep.1980, pp. 1424-1427.
J. of Medicinal Chemistry, 35:958-965 (1992) D. T. Connor, et al.
J. of Heterocyclic Chemistry, 8:711-714 (1971) Wright, W. B., Jr. and Brabander, H. J.
J. of Heterocyclic Chemistry, 23:1571-1577 (1986) Pakray, S. and Castle, R. N.

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