Process for the preparation of carbamates, thiocarbamates and ur

Details Process for the preparation of carbamates, thiocarbamates and ur Process for the preparation of carbamates, thiocarbamates and ur

1985-02-14

1988-02-16

Daus, Donald G.

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

Organic compounds

Unsubstituted hydrocarbyl chain between the ring and the -c-...

560 24, 560 32, 560132, 560157, 560160, 560163, 560165, 558232, 564 61, 564 63, 564255, 564483, 548341, 548533, 548531, 549462, 549490, 549496, 546210, 546226, 546245, 544172, C07D22304

Patent

active

047256800

ABSTRACT:
The invention relates to a process for preparing carbamic acid derivatives of formula: ##STR1## in which R.sup.1 or R.sup.2 denotes a hydrogen atom or a substituted or unsubstituted, saturated or unsaturated aliphatic, cycloaliphatic or heterocyclic radical, or R.sup.1 and R.sup.2 together form a ring, and Y denotes OR, SR, ##STR2## groups, R being a substituted or unsubstituted, saturated or unsaturated aliphatic or cycloaliphatic radical, or a substituted or unsubstituted aromatic radical, R.sup.3 and R.sup.4 denote a hydrogen atom or an aliphatic, cycloaliphatic, araliphatic, aromatic or heterocyclic radical or together form a ring, and R.sup.6 and R.sup.7 denote a saturated or unsaturated, substituted or unsubstituted aliphatic or cycloaliphatic radical, a hydrogen atom, an alkylthio radical or an alkyloxy radical.
According to the process, a compound of formula ##STR3## is reacted with an .alpha.-halogenated derivative of formula ##STR4## at a temperature of -5.degree. to 150.degree. C. in the presence of an acceptor for hydrohalic acid.
The carbamates, thiocarbamates or ureas obtained are very useful, especially as pesticides.

REFERENCES:
patent: 3763217 (1973-10-01), Brill
Patai, ed., The Chemistry of Carboxylic Acids and Esters, Interscience (1969), pp. 576-579.

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