| abstract |
1409978 N-alkylation of heterocyclic imines BADISCHE ANILIN- & SODA-FABRIK AG 6 Feb 1973 [7 Feb 1972] 5815/73 Heading C2C The title gas-phase process is effected by means of an aliphatic alcohol (e.g. MeOH) or an ether thereof, in presence of a catalyst comprising SiO 2 of specific surface area 50-500 m.<SP>2</SP>/g. and containing 0À1-20 wt. per cent phosphoric acid. Specified products are N- methylmorpholine, N - methylpyrrolidine, N - methylpiperazine and N,N<SP>1</SP> - dimethylpiperazine. |