Process for preparing E-isomer of a triazolyl styryl ketone deri

Details Process for preparing E-isomer of a triazolyl styryl ketone deri Process for preparing E-isomer of a triazolyl styryl ketone deri

1987-01-28

1989-03-21

Hollrah, Glennon H.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

568310, C07D24912

Patent

active

048144614

ABSTRACT:
A novel process for preparing E-isomer of a triazolyl styryl ketone derivative of the formula (I): ##STR1## which includes treating Z-isomer of the derivative (which may contain E-isomer of the derivative) with sulfuric acid and an isomerization catalyst in an organic solvent, precipitating and separating the resulting sulfuric acid salt of E-isomer from the solution, and decomposing the resulting precipitate to obtain E-isomer of the derivative free from sulfuric acid. The E-isomer is useful for preparing E-isomer of triazolyl styryl carbinol of the formula (II): ##STR2## which is useful as an antimicrobial agent, a herbicide, a plant growth regulator, or the like.

REFERENCES:
patent: 4018718 (1977-04-01), Ochsner et al.
Baranyai et al., "Determination of the Geometric, etc.", CA 95:169538d (1981).
Cobb et al., "Isomerization of Cis, Tranc, etc.", CA 87:200936t (1977).

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