Oxalyl chloride → Epoxysuccinic acid monoallylester chloride

Participants

Reaction Steps

When 0.65 g of epoxysuccinic acid monoallylester chloride which was prepared from 1.0 g of allyl potassium epoxysuccinate (i.e. allyl potassium oxirane 2,3-dicarboxylate) by treatment with oxalyl chloride in a manner as described in Example 46 was reacted with L-tyrosine benzyl ester in dichloromethane by the method as described in Example 46, N-(3-allyloxycarbonyloxirane-2-carbonyl)-L-tyrosine benzyl ester(EP-147) was obtained as a colorless oil. Yield 1.0 g (68%). Mass: m/e 425 (M+). IRνfilm (cm-1): 3480 (amine, hydroxy), 1755 (ester), 1685, 1525 (amide), 1625 (C=C), 895 (epoxide). NMR(CDCl3)δ: 2.98 (2H, d, J=6 Hz), 3.19 (0.5H, d, J=2 Hz), 3.43 (0.5H, d, J=2 Hz), 3.58 (0.5H, d, J=2 Hz), 3.61 (0.5H, d, J=2 Hz), 4.5-6.2 (6H, m), 5.08 (2H, d, J=3 Hz), 6.25-7.0 (4H, m), 7.25 (5H, s).

Provenance & Evidence