Oxalyl chloride → HCID 86584593, compound

Participants

Reaction Steps

3.78 g (12.4 mmol) monomenthyl (−)-phthalate (Fluka) was heated at reflux in 19 ml oxalyl chloride (18 eq.) for 1.5 h. The excess oxalyl chloride was distilled under vacuum. 2.75 g crude acid chloride was then diluted in 5 ml THF cooled to −8° under argon, and 0.97 g (3 eq.) NaBH4 was added. The reaction mixture was maintained under stirring at 0° for 10 min and at ambient temperature for 30 min. The mixture was then poured over cold 5% KHSO4 then extracted using diethyl ether. Chromatography of the crude product over silica gel (93:7 toluene/ether) yielded 1.85 g (55%) pure (1R,3R,4S)-3-p-menthanyl 2-hydroxymethylbenzoate in the form of a colourless oil.

Provenance & Evidence