Triethylamine → HCID 54032578, compound

Participants

Reaction Steps

In 30 ml of tetrahydrofuran, 3.2 g of N-(cyclohexylmethoxycarbonyl)-tyrosine was dissolved. To the solution were added 1.1 g of ethyl chlorocarbonate and 1.0 g of triethylamine while cooling with ice and stirring. After stirring the mixture for 10 minutes, the precipitate was removed by filtration. The filtrate was added to a suspension of 1.0 g of sodium borohydride and 10 ml of tetrahydrofuran cooled with ice. The mixture was stirred for 2 hours, then neutralized with hydrochloric acid and concentrated in vacuo. The residue was extracted with ethyl acetate and the extract was washed with water, dried and concentrated to dryness. The residue was crystallized from ethyl acetate-petroleum ether to give 2.3 of N-(cyclohexylmethoxycarbonyl)-tyrosinol with a melting point of 121-126° C.

Provenance & Evidence