Patent ID: 6700017
Filing Date: 2004-03-02
Classification: C07C

Abstract:
A process for preparing a compound of the formula (I) whereinR represents substituted or unsubstituted alkyl, the process comprising: (a) reacting a compound of the formula (II) â€ƒwith an alkylating agent of the formula (III) Râ€”Xâ€ƒâ€ƒ(III) wherein R is as defined above, and X represents halogen, â€”Oâ€”COâ€”Oâ€”R, â€”Oâ€”SO2â€”R1 or â€”Oâ€”SO2â€”Oâ€”R, wherein R is as defined above and R1 represents alkyl or optionally alkyl-substituted phenyl, â€ƒif appropriate in the presence of a diluent and if appropriate in the presence of an acid acceptor, if appropriate in the presence of a phase-transfer catalyst, or (b) reacting a compound of the formula (IV) â€ƒwith an alkoxyamine of the formula (V) Râ€”Oâ€”NH2â€ƒâ€ƒ(V) wherein R is as defined above, â€ƒor an acid addition complex thereof, â€ƒif appropriate in the presence of a diluent and if appropriate in the presence of a buffer medium