Palmitoyl chloride → HCID 22406861, compound

Participants

Reaction Steps

Hexadecanoyl chloride (0.83 g) in dichloromethane (5 ml) was added dropwise to a stirring solution of 1-[1-(2-chlorophenyl)cyclopropyl]-7-hydroxy-6-methoxy-2-methyl-1,2,3,4-tetrahydroisoquinoline (1.04 g, prepared from the (+)-enantiomer of the hydrobromide salt, prepared in a similar manner to that described in Example 77), triethylamine (0.91 g) and dichloromethane (20 ml). The mixture was stirred at ambient temperature for 2 hours, then washed with dilute sodium hydroxide solution, water and brine. The organic phase was dried over magnesium sulphate, filtered and concentrated in vacuo. The resulting oil was dissolved in petroleum ether (b.p. 60°-80° C.) and washed repeatedly with water. The organic layer was dried over magnesium sulphate, filtered and concentrated in vacuo to yield (+)-1-[1-(2-chlorophenyl)cyclopropyl]-7-hexadecanoyloxy-6-methoxy-2-methyl-1,2,3,4-tetrahydro-isoquinoline (1.45 g) which had a specific optical rotation αD of +21.18°.

Provenance & Evidence