Formaldehyde → 4-(4-Bromobenzyl)-1-methylpiperidine

Participants

Reaction Conditions

Reaction Steps

A mixture of 4-(4-bromobenzyl)-piperidine (290 mg, 1.14 mmol), formic acid (12 mL) and 37% aqueous formaldehyde (0.30 mL, 3.75 mmol) was divided into three portions. Each portion was heated at 150° C. for 5 minutes in a microwave reactor. The combined cold mixture was loaded onto a 5 g SCX-2 cartridge which was then washed with methanol (30 mL) then 2 N ammonia in methanol (50 mL). Concentration of the combined basic fractions in vacuo gave the title compound (300 mg, 98%) as a colourless oil. LCMS (Method B): RT=2.18 min, M+H+=268, 270.

Provenance & Evidence