1-Naphthaldehyde → (S)-3-(4-Bromo-phenyl)-2-{4-[(naphthalen-1-ylmethyl)-amino]-benzoylamino}-propionic acid methyl ester

Participants

Reaction Steps

(S)-3-(4-Bromo-phenyl)-2-{4-[(naphthalen-1-ylmethyl)-amino]-benzoylamino}-propionic acid methyl ester (273 mg) was prepared from (S)-2-(4-amino-benzoylamino)-3-(4-bromo-phenyl)-propionic acid methyl ester (415 mg, 1.1 mmol) and 1-naphthaldehyde (0.331 mL, 2.4 mmol) according to Procedure G, except for the following: the reaction was done in 15 mL DCE and 5 mL THF, was allowed to stir for 15 min before NaBH(OAc)3was added, was treated with two additional equiv. NaBH(OAc)3 after 2 h, and an adapted work-up. After reaction completion, 100 mL of DCM was added and the organic washed with saturated sodium bicarbonate, dried over sodium sulfate, and evaporated. The crude material was triturated with MeOH.

Provenance & Evidence