反応 #2254196

反応方程式

(S)-2-Amino-5-(3-(2,2,4,6,7-pentamethyl-2,3-dihydrobenzofuran-5-ylsulfonyl) guanidino)pentanoic acid

acetic anhydride

→

(S)-2-acetamido-5-(3-((2,2,4,6,7-pentamethyl-2,3-dihydrobenzofuran-5-yl)sulfonyl) guanidino)pentanoic acid

溶媒

pyridine

反応条件

後処理

1. 1
   その他after 1 h the reaction is quenched with aqueous acid
2. 2
   抽出extracted with ethyl acetate
3. 3
   その他purified by chromatography

実験手順

(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).

出典