HRID1649342

反应详情

EQUATION

反应方程式

HRID 1649342 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

2

PROCEDURE

实验过程

In the same manner as Example 5, Boc-Trp-OBzl (1.97 g, 5 mM) was reacted with 4-methoxy-2,3,6-trimethylbenzene-sulfonyl chloride (1.87 g, 7.5 mM) in dichloromethane in the presence of sodium hydroxide (500 mg, 12.5 mM) and cetyltrimethylammonium chloride (16 mg, 0.05 mM). The reaction product was then hydrolyzed with an aqueous solution of sodium hydroxide to give Boc-Trp(Mtr)-OH. Yield 2.05 g (79.4%); m.p. 78°-80° C.; [α]D22 -24.8° (c=0.5, DMF).