Hydrochloric Acid → HCID 70276607, compound

Participants

Reaction Steps

To a 250 mL round bottom flask equipped with an addition funnel was added a solution of sodium 8-aminocaprylate (14.61 mmol, 32.5 mL, 1.2 equiv). The pH of the solution was adjusted to 8.2 by addition of concentrated HCl. The solution was cooled in an ice-bath. Boc-Phe-OSu (12.42 mmol, 4.50 g, 1.0 equiv) was dissolved in 1,4-dioxane (20 mL) and added dropwise. The mixture was stirred in the ice-bath for 30 min and at ambient temperature for 12 h. The solution was acidified with 1 M sulfuric acid (80 mL) and extracted with ether (100+50 mL). The combined organic layers were washed with water (40 mL), dried and evaporated to give a pale yellow oil. The oil was triturated with hexanes (3×50 mL) to afford (N-tert-butoxycarbonylphenylalanyl)-8-aminocaprylic acid (5) (2.17 g, 43%) as a colorless solid.

Provenance & Evidence