Diethyl Ether → HCID 131712167, compound

Participants

Reaction Steps

A solution of 0.5 g (0.00125 mole) of N-carbobenzoxy-L-prolyl-dehydrophenylalanine in 3 ml of 32% HBr/HOAc was treated as N-carbobenzoxy-L-prolyl-dehydrophenylalanine azlactone was treated in Example 7(a) except that the ether precipitated product was allowed to stand two days at room temperature before filtration and crystallization from methanol/ethyl acetate to yield 0.313 g (74%) of L-prolyl-dehydrophenylalanine hydrobromide, m.p. 227°-228.5° (dec.), RfoA 0.45.

Provenance & Evidence