4-Toluenesulfonyl chloride → HCID 87679671, compound

Participants

Reaction Steps

nBuLi (2.8 N, 1.01 g, 0.0157 mol) was added at −78° C. to a solution of 1-benzyl-1-(2-hydroxy-ethyl)-3-methyl-urea (3 g, 0.0143 mol, from (i) above) in 30 ml of dry TBF and stirred at same temperature for 30 min under nitrogen atmosphere. P-Toluenesulfonyl chloride (3 g, 0.0157 mol) in 20 ml of dry THF was added dropwise at −78° C. and stirred for 3 h under nitrogen atmosphere. The reaction was quenched with methanol and solvent evaporated under reduced pressure. The crude was purified by column chromatography over silica gel using 12% methanol in dichloromethane as eluent to yield 2.5 g of the title compound as a solid.

Provenance & Evidence