Process for making 2-mercapto benzimidazoles in the presence of

Details Process for making 2-mercapto benzimidazoles in the presence of Process for making 2-mercapto benzimidazoles in the presence of

1982-09-01

1986-06-03

Lesmes, George F.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548305, C07D23528

Patent

active

045931054

ABSTRACT:
A process is provided for making benzimidazoles having the formula ##STR1## wherein Y is oxygen, sulfur or --NH; R.sup.1 is hydrogen, C.sub.1 -C.sub.12 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl, C.sub.7 -C.sub.9 aralkyl or C.sub.7 -C.sub.9 alkaryl; R.sup.2 is hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy or halogen; and n is 1 or 2; comprising reacting a compound having the formula ZYCN, wherein Z is an alkali metal or ammonium moiety and Y has the meanings above; with a compound having the formula ##STR2## wherein R.sup.1, R.sup.2 and n have the meanings above, in the presence of a C.sub.4 -C.sub.10 alkanol and, except when Z is NH.sub.4, in the presence of an acid.

REFERENCES:
Allen, J. A. et al., Organic Synthesis, vol. 4, 569-570, 1963.

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