1,1,1-Trihalo-2-hydroxy-4-(2-hydroxyphenyl)-4-butanones

Details 1,1,1-Trihalo-2-hydroxy-4-(2-hydroxyphenyl)-4-butanones 1,1,1-Trihalo-2-hydroxy-4-(2-hydroxyphenyl)-4-butanones

1978-10-05

1980-03-18

Reamer, James H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 4982

Patent

active

041939417

ABSTRACT:
A new synthesis for the preparation of 6-(2-hydrophenyl)-3-pyridazinones whose key reaction is cyclizing a 1,1,1-trihalo-2-hydroxy-4-(2-hydroxyphenyl)-4-butanone with hydrazine. 6-(2-Hydroxyphenyl)-3-pyridazinones are important intermediates for preparing medicinally active compounds especially 3-[2-(3-tert.-butylamino-2-hydroxypropoxy)phenyl]-6-hydrazinopyridazine or its nontoxic acid addition salts. The invention claimed here is the trihalocarbinol intermediates.

REFERENCES:
patent: 3627847 (1971-12-01), Langhammerer
Dorai et al., Ind. J. Chem., vol. 13, pp. 854-855, (1975).

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