Methanol → HCID 178501505, compound

Participants

Reaction Steps

2.10 g of Nω -t-butoxycarbonyl-Nω -mesitylenesulfonyl-L-arginine [Boc-Arg(Mts)-OH] was dissolved in 31 ml of dry dioxane and 31 ml of 4N HCl-dioxane was added thereto. The obtained mixture was stirred at room temperature for 1 hour. The resulting solution was concentrated under reduced pressure to dryness and then crystallized by adding dry ether. The target product was collected by centrifugation, washed with dry ether several times and dried in a desiccator. Thus 1.1 g of HCl.H-Arg(Mts)-OH from which Boc groups had been removed was obtained. This product was next added to a solution, which had been prepared by slowly adding 2.9 ml of SOCl2 to 10.6 ml of methanol and stirring at -10° C. for 10 minutes, and the obtained mixture was stirred for 15 hours, concentrated to dryness, crystallized from dry ether, centrifuged, washed with dry ether several times and dried. Thus 0.94 g of HCl.H-Arg(Mts)-OMe was obtained.

Provenance & Evidence