PURPOSE: To provide a catalyst optimal for the rearrangement of an oxime to the corresponding amide in a liquid phase under mild conditions, prepared from an N,N-disubstituted formamide, chlorothiophosphoric diester and phosphorus oxytrichloride and/or phosphorus pentachloride.
CONSTITUTION: In producing an amide by the rearrangement of the corresponding oxime, a catalyst prepared from (A) an N,N-disubstituted formamide of formula I (R1 and R2 are each 1-6C alkyl, 6-9C phenyl or substituted phenyl) (e.g. N,N-dimethylformamide), (B) a chlorothiophosphoric diester of formula II (R3 and R4 are each 1-8C alkyl, 6-9C phenyl or substituted phenyl) (e.g. dimethyl chlorothiophosphate) and (C) phosphorus oxytrichloride and/or phosphorus pentachloride, is used. For example, a mixture of a chlorothiophosphoric diester, phosphorus oxytrichloride or phosphorus pentachloride with an N,N- dialkylformamide is heated, if necessary, to prepared the present catalyst, which is then incorporated with an oxime to carry out rearrangement reaction.
SATO HIROSHI
NOMURA KOZABURO
SHIMADA TAKESHI
SUMITOMO CHEMICAL CO
| JPH04253944A | 1992-09-09 |
Next Patent: PRODUCTION OF 2-ARYL-5-(TRIFLUOROMETHYL)-2-PYRROLINE COMPOUND AND INSECTICIDAL 2-ARYL-1-(ALKOXYMETHY...