Chloroacetaldehyde → HCID 57906525, compound

Participants

Reaction Steps

A mixture of (2-amino-5-bromo-pyridin-4-ylmethyl)-carbamic acid tert-butyl ester (1.0 g, 3.3 mmol), NaHCO3 (474 mg, 5.6 mmol) and chloracetaldehyde (2.2 mL, 15.0 mmol) was vigorously stirred and refluxed for 14 h. The reaction mixture was cooled to RT, concentrated under vacuum and the remaining residue was suspended in DCM and brine. The aqueous layer was separated and extracted with DCM (5×), and the combined organic fractions were dried over Na2SO4, filtered, and evaporated. The residue was purified by Combi-Flash Companion™ (Isco Inc.) column chromatography (SiO2; gradient elution, hexane/DCM/TBME 10:10:1→1:1:18) to yield the title compound (860 mg, 2.6 mmol, 79%) as a pale yellow solid. MS: 327 [M+1]+; HPLC: AtRet=1.07; TLC: RF 0.16 (hexane/DCM/TBME 1:1:2).

Provenance & Evidence