S-phenyl ethanethioate

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of benzotriazol-1-yl-(2,2,6,6-tetramethyl-tetrahydro-pyran-4-yl)-methanone (1.70 g, 5.62 mmol), magnesium bromide diethyl etherate (4.14 g, 16.06 mmol), and S-phenyl thioacetate (0.76 mL, 5.35 mmol) in 21 mL of DCM at RT was added dropwise DIEA (3.95 mL, 21.41 mmol). The mixture was stirred overnight and then diluted with 50 mL of DCM and washed with 1N HCl (100 mL) and brine (100 mL). The organic layer was dried over Na2SO4, concentrated, and the residue purified by flash chromatography on silica gel to give 1.2 g (70%) of a colorless oil. Mass spectrum (ESI, m/z): Calculated for C18H24O3S, 321.1 (M+H), found 321.1. washed with 1N HCl (100 mL) and brine (100 mL) The organic layer was dried over Na2SO4 concentrated the residue purified by flash chromatography on silica gel