HCID 131712540, compound → 5-Oxo-L-prolyl-L-threonyl-L-prolinamide

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Reaction Steps

2.04 g (3.7 mmoles) of Z-Glp-Thr(Bzl)-Pro-NH2 are dissolved in 40 ml of acetic acid, 0.4 g of a 10% palladium-on-carbon catalyst are added, and hydrogen is bubbled through the mixture for 4 hours. The catalyst is filtered off, the filtrate is evaporated, and the residue is triturated with ether. The resulting 1.31 g of amorphous crude product are applied onto the top of a column filled with 30 g of silica gel (particle size: 0.063-0.2 mm), and the column is eluted with solvent mixture (3). The main fractions which contain the pure substance are combined, evaporated, and the product is isolated with ether. 0.72 g (59.5%) of Glp-Thr-Pro-NH2 are obtained; Rf4 =0.16, [α]D25 =-90.0° (c=1%, in acetic acid). Amino acid analysis: Glu: 1.00 (1.0), Thr: 0.99 (1.0), Pro: 1.03 (1.0).

Provenance & Evidence