Chloromethylation of thiophene

Details Chloromethylation of thiophene Chloromethylation of thiophene

2002-05-16

2008-12-09

Solola, Taofiq A (Department: 1625)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

active

07462725

ABSTRACT:
The process according to the invention relates to the preparation of 2-chloromethyl-thiophene of the formula (I). During this process thiophene is chloromethylated in the presence of one or more compounds containing keto group and optionally it is transformed into the compound of the formula (II). Compounds of formula (I) and (II) are intermediates of several pharmaceutically active ingredients.

REFERENCES:
patent: 2527680 (1950-10-01), Kyrides et al.
patent: 4501903 (1985-02-01), Mirviss
Shah et., J. Indian Chem. Soc. (1962), vol. 39(8), p. 507-510.
Dermer et al., J. Am. Chem. Soc. (1952), vol. 74, pp. 3417-3418.

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