4-Nitrobenzoic Acid → HCID 58437735, compound

Participants

Reaction Steps

To an ice-cooled solution of (3-Hydroxy-cyclobutylmethyl)-carbamic acid tert-butyl ester (6.98 g, 34.7 mmol), 4-nitrobenzoic acid (11.59 g, 69.4 mmol) and triphenylphosphine (18.19 g, 69.4 mmol) in THF (1 L) was added a solution of DIAD (14.76 g, 69.4 mmol) in THF (10 mL). After removal of the ice bath, the mixture was stirred at RT for 15 h. The mixture was concentrated to dryness and the oily residue was purified normal phase column chromatography (elution with DCM) yielding the title intermediate as a yellow solid (9.89 g, 22.58 mmol, 65%), HPLC: FtRet=1.354; LC-MS: m/z 368.3 [M+NH4]+.

Provenance & Evidence