Thionyl Chloride → (R)-Benzyl (2,5-dioxotetrahydrofuran-3-yl)carbamate

Beteiligte Stoffe

Reaktionsschritte

A stirred suspension of N-(benzyloxycarbonyl)-D-aspartic acid (14.7 g, 55.1 mmol) in ethyl acetate (100 mL) was treated dropwise with thionyl chloride (40 mL, 511 mmol) and the resulting homogeneous mixture was stirred at room temperature for 16 hours, and concentrated. The resulting solid was triturated in 1:1 diethyl ether/hexanes (200 mL) for 2 hours and filtered. The solid was dried to provide the desired product (13.7 g, 99%).

Herkunft & Nachweise