Triethylamine → HCID 70578137, compound

Participants

Reaction Steps

A solution of cyclopropane carboxylic acid chloride (1.2 ml.) in methylene chloride (10 ml.) is added dropwise with stirring to a mixture of 4-methoxyxanthene-9-spiro-4'-piperidine (2.0 g.) and triethylamine (1.6 ml.) in methylene chloride (40 ml.) at 5° C. The mixture is allowed to reach room temperature and stirred overnight. The mixture is washed with 3N hydrochloric acid, 3N sodium hydroxide solution and water, dried MgSO4 and the methylene chloride evaporated to dryness, to give 1'-cyclopropylcarbonyl-4-methoxyxanthene-9-spiro-4'-piperidine (I.R. amide band 1620 cm.-1 ; t.l.c. -- single spot) which is used without further purification.

Provenance & Evidence