Boc-Gly-Val-Gly-Ile-Pro-OBzl → Boc-Gly-Val-Gly-Ile-Pro-OH

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Reaction Steps

III (7.8 g, 0.0123 mole) was taken in acetic acid (80 ml) and hydrogenated in the presence of 10% Pd-C. (1 g) at 40 psi. After filtering the catalyst with the aid of celite, the solvent was removed under reduced pressure, triturated with ether, filtered, washed with ether then pet. ether and dried to obtain 6.5 g of the product (yield: 97.3%), m.p. shrinks at 127° C. and decomp. at 3 145° C. Rf3, 0.24; Rf4, 0.11 Anal. Calcd. for C25H43N5O10.1/2H2O: C 54.52, H 8.05, N 12.71%. Found: C 54.32, H 8.02, N 12.59%.

Provenance & Evidence