反应详情
EQUATION
反应方程式
REACTANTS
反应物
PRODUCTS
产物
AUXILIARIES
试剂、催化剂与溶剂
PROCEDURE
实验过程
To H-Asp (OtBu)-OtBu hydrochloride salt (28 mg, 0.10 mmol) in dry DMF (2 mL) was sequentially added at room temperature 2-(3-tritylsulfanyl-propyl)-succinic acid 4-tert-butyl ester (50 mg, 0.10 mmol), HOBt (14 mg, 0.10 mmol), PYBOP (56 mg, 0.11 mmol) and DIPEA (37 μL, 0.20 mmol). The usual aqueous work up yielded the title compound (62 mg, 86%) as a colorless residue: 1H NMR (CDCl3, 400 MHz) δ 7.41–7.38 (m, 6H), 7.29–7.25 (m, 6H), 6.60–6.57 (m, 1H), 4.68–4.56 (m, 1H), 3.18–3.14 (m, 2H), 2.89–2.80 (m, 1H), 2.74–2.52 (m, 2H), 2.43–2.36 (m, 1H), 2.32–2.19 (m, 1H), 2.12–2.07 (m, 2H), 1.83–1.80 (m, 2H), 1.60–1.53 (m, 1H), 1.45–1.40 (m, 27H); 13C (DEPT) (CDCl3, 100 MHz) δ 129.4, 127.7, 126.4, 49.0, 48.7, 46.1, 42.5, 37.8, 37.6, 37.2, 31.6, 31.5, 29.6, 27.9, 27.8, 27.7, 26.3, 26.2, 26.0.