1-Hydroxybenzotriazole → HCID 86714205, compound

Participants

Reaction Conditions

Reaction Steps

The PNP-derivative 34 derived from the minor alcohol 31 (300 mg, 1.03 mmol) was dissolved in 10.3 g THF. Diisopropylethylamine (362 mg, 2.80 mmol) was added, followed by 1-hydroxybenzotriazole (75 mg, 0.556 mmol) and ethyl 2-(4-aminophenyl)-2-hydroxyacetate (325 mg, 1.67 mmol, prepared as described in WO 2009109998). The mixture was stirred in the dark at ca. 30° C. for 6 days. The solvent was removed by rotary evaporation and the residue was chromatographed on 21 g silica, using dichloromethane with gradually increasing amounts of TBME as the eluent. The product eluted with ca. 5% TBME. Rotary evaporation of the product fractions afforded minor (E)-ethyl 2-(4-(((cyclooct-2-en-1-yloxy)carbonyl)amino)phenyl)-2-hydroxyacetate (36) as a viscous oil (350 mg, 1.01 mmol, 99%).

Provenance & Evidence