Triethylamine → Toluene-4-thiosulfonic acid S-(2-tert-butyl-4-tert-butylsulfamoyloxy-5-methyl-phenyl) ester

Participants

Reaction Conditions

Reaction Steps

To a round bottom flask equipped with a magnetic stirrer were added 1.10 g (3.20 mmol) of toluene-4-thiosulfonic acid S-(2-tert-butyl-4-hydroxy-5-methyl-phenyl) ester (prepared in Example RRR), Et2O (50 mL), and 0.90 mL (6.40 mmol) of NEt3, in that order. The solution was cooled to 0° C. To this solution was rapidly added a solution of 1.10 g (6.40 mmol) of (tert-butyl amino)sulfonyl chloride (Matler, W. L., Comer, W. T., and Deitchman, D., Journal of Medicinal Chemistry, 1972,15 (5), 538-541) in Et2O (10 mL). A precipitate ensued and the reaction was allowed to stir for 30 minutes. Another two equivalents of (tert-butyl amino)sulfonyl chloride (1.10 g, 6.40 mmol) in Et2O (10 mL) and NEt3 (0.90 mL, 6.40 mmol) were added, and the reaction mixture was stirred for another 30 minutes. The reaction was quenched with brine and the organics extracted with Et2O. The organics were dried (MgSO4) and concentrated. The residue was submitted to flash chromatography (EtOAc:CHCl3 1:9) to yield the title compound. 1H NMR (CDCl3) δ 1.23 (s, 9 H), 1.46 (s, 9 H), 2.25 (s, 3 H), 2.42 (s, 3 H), 4.63 (br s, 1 H), 7.23 (s, 1 H), 7.26 (s, obscured by CDCl3, 1 H), 7.42 (d, 2 H), 7.46 (d, 2 H).

Provenance & Evidence