4-Toluenesulfonyl chloride → (RS)-Toluene-4-sulfonic acid 6-methoxy-1,2,3,4-tetrahydro-naphthalen-2-ylmethyl ester

(RS)-(6-methoxy-1,2,3,4-tetrahydro-naphthalen-2-yl)-methanol (939 mg, 4.88 mmol), p-toluenesulfonyl chloride (934 mg, 4.9 mmol), triethylamine (1.12 ml, 7.88 mmol) and N,N-dimethyl aminopyridine (10 mg) in CH2Cl2 (10 ml) was stirred together at ambient temperature for 24 hr. Acidification with 1N HCl (pH 1-2), extraction of the aqueous phase with CH2Cl2 (2×20 ml), drying (Na2SO4) filtration and evaporation afforded the crude product which wag chomatographed over SiO2 (Merck 230-400 mesh) eluting with EtOAc-n-Hexane (1:3) to afford the title compound as a colourless oil (1.37 g, 3.95 mmol, 81%), MS m/e=346.1 (M+).