4-chloro-N-methylpiperidine → HCID 20382083, compound

Participants

Reaction Steps

A Grignard reagent is prepared from 7.2 g. of magnesium turnings (0.3 mol.), 230 ml. of dry tetrahydrofuran and 40 g. of 4-chloro-1-methyl-piperidine (0.3 mol.). To this Grignard solution 31 g. of 4-chloro-1-ethyl-5,6-dihydrobenzo[5,6]cyclohepta[1,2-b]pyrazolo[4,3-e]pyridin-11(1H)-one (0.1 mol.), from example 1(e), dissolved in 230 ml. of dry tetrahydrofuran is added. Reaction and work-up according to the procedure of example 15 yields 4-chloro-1-ethyl-1,5,6,11-tetrahydro-11-(1-methyl-4-piperidinyl)benzo[5,6]cyclohepta[1,2-b]pyrazolo[4,3-e]pyridin-11-ol; m.p. 130°-132° (hexane, refrigerator).

Provenance & Evidence