Process for the preparation of alkoxytriazolinones

Details Process for the preparation of alkoxytriazolinones Process for the preparation of alkoxytriazolinones

1995-09-15

1997-01-14

Morris, Patricia L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D24912

Patent

active

055941486

ABSTRACT:
Alkoxytriazolinones of the general formula (I), ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent in each case optionally substituted alkyl, alkenyl, alkinyl, cycloalkyl, cycloalkylalkyl, aryl or arylalkyl,
(which can be used as intermediates for the preparation of herbicidal active compounds) are obtained in very good yields and in high purity by reacting iminocarbonic diesters (II) with carbazinic esters (III) ##STR2## in which R.sup.3 and R.sup.4 in each case represent, for example, alkyl or aryl,
at -20.degree. C. to +120.degree. C. (1st step) and subjecting the semicarbazide derivatives (IV) formed in this process with elimination of R.sup.3 -OH ##STR3## to a cyclizing condensation reaction in the presence of a base at +20.degree. C. to 100.degree. C. with elimination of R.sup.4 -OH, if appropriate after intermediate isolation (2nd step).

REFERENCES:
patent: 5356865 (1994-10-01), Muller et al.
patent: 5488028 (1996-01-01), Haas et al.
Chem. Abstracts 82:86060x (1975).
Chem. Abstracts vol. 42: 8109d (1948).
J. Indian Chem. Soc. vol. 6 (1929) pp. 565-575 (In English).
J. Chem. Soc. Perkin I 1973, pp. 2644-2646 (in English).

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