Process for preparing carbamic acid derivatives

Details Process for preparing carbamic acid derivatives Process for preparing carbamic acid derivatives

C - Chemistry, Metallurgy

07

C

260/452, 260/446

C07C 271/06 (2006.01) C07D 207/16 (2006.01) C07D 233/60 (2006.01) C07D 295/205 (2006.01) C07D 295/21 (2006.01) C07D 295/215 (2006.01) C07D 307/42 (2006.01) C07D 307/86 (2006.01) C07D 521/00 (2006.01) C07F 7/08 (2006.01)

Patent

CA 1278307

Abstract Process for preparing carbamic acid derivatives Process for preparing carbamic acid derivatives The invention relates to a process for preparing carbamic acid derivatives of formula: Image in which R1 or R2 denotes a hydrogen atom or a substi- tuted or unsubstituted, saturated or unsaturated aliphatic, cycloaliphatic or heterocyclic radical, or R1 and R2 together form a ring, and Y denotes OR, SR, Image or O - N = Image , groups, R being a substituted or unsubstituted, saturated or un- saturated aliphatic or cycloaliphatic radical, or a sub- stituted or unsubstituted aromatic radical, R3 and R4 denote a hydrogen atom or an aliphatic, cycloaliphatic, araliphatic, aromatic or heterocyclic radical or together form a ring, and R6 and R7 denote a saturated or un- saturated, substituted or unsubstituted aliphatic or cyclo- aliphatic radical, a hydrogen atom, an alkylthio radical or an alkyloxy radical. According to the process, a compound of formula Image is reacted with an .alpha.-halogenated derivative of formula R5 - ?H - O - ? -Y at a temperature of -5° to 150°C in the presence of an asceptor for hydrohalic acid. The carbamates, thiocarbamates or ureas obtained are very useful, especially as pesticides.

474426

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