反应详情

Preparation of example 52 from the title compound of Example 51 (32 mg, 0.050 mmol) and 45% TFA in CH2Cl2 (1 mL) was carried out analogously to Example 20. (Deprotection of trityl group was effected using the same conditions as for tert-butoxycarbonyl deprotection.) Isolation, also in an analogous manner, additionally included recrystallization from methanol/ethyl acetate and diethyl ether to afford the title compound (16 mg, 0.031 mmol) as a yellow powder in 62% yield.

1. custom) Isolation, also in an analogous manner, additionally included recrystallization from methanol/ethyl acetate and diethyl ether