Oxonium, triethyl-, hexafluorophosphate(1-) (1:1) → HCID 9998689, compound

Participants

Reaction Steps

2,4-Dibenzyloxybenzoic acid was reacted with oxalyl chloride in toluene and DMF at 0-25° C. to give an acid chloride. The acid chloride was reacted with aqueous ammonia in methylene chloride to yield 87% (over 2 steps) of 2,4-dibenzyloxybenzamide. 2,4-Dibenzyloxybenzamide was reacted with triethyloxonium hexafluorophosphate in methylene chloride to yield 69% of ethyl 2,4-dibenzyloxybenzimidate. The ethyl 2,4-dibenzyloxybenzimidate was hydrogenated over a palladium/carbon catalyst with 1 atmosphere of hydrogen gas in ethanol, to yield 75% of ethyl 2,4-dihydroxybenzimidate. The overall yield for the reaction sequence was 34% for six steps.

Provenance & Evidence