反应详情

(S)-2-Amino-5-(3-(2,2,4,6,7-pentamethyl-2,3-dihydrobenzofuran-5-ylsulfonyl) guanidino)pentanoic acid (H-L-Arg(Pbf)-OH) (1.0 eq.) is dissolved in pyridine (0.25 M) and acetic anhydride (1.2 eq.) is added to acylate the primary amine, after 1 h the reaction is quenched with aqueous acid, extracted with ethyl acetate, and purified by chromatography to afford (S)-2-acetamido-5-(3-((2,2,4,6,7-pentamethyl-2,3-dihydrobenzofuran-5-yl)sulfonyl) guanidino)pentanoic acid (Ac-L-Arg(Pbf)-OH).

1. customafter 1 h the reaction is quenched with aqueous acid
2. extractionextracted with ethyl acetate
3. custompurified by chromatography