Sodium Bicarbonate → (3R,4R)-methyl 4-(4-(benzyloxy)phenylsulfonamido)-3-methyl-tetrahydro-2H-pyran-3-carboxylate

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Reaction Steps

Crude methyl 4-amino-3-methyl-tetrahydro-2H-pyran-3-carboxylate hydrochloride (8.65 mmol), 4-benzyloxy-benzenesulfonyl chloride (1.2 eq), CH2Cl2 (175 mL) and saturated NaHCO3 (90 mL) were combined and stirred at room temperature overnight. The organic phase was then washed with water (100 mL) and brine (100 mL), dried over MgSO4, and concentrated. The residue was purified by chromatography with 20-35% ethyl acetate/hexane to provide two diastereomers, (3R,4R)-methyl 4-(4-(benzyloxy)phenylsulfonamido)-3-methyl-tetrahydro-2H-pyran-3-carboxylate and (3S,4R)-methyl 4-(4-(benzyloxy)phenylsulfonamido)-3-methyl-tetrahydro-2H-pyran-3-carboxylate. MS: (M+H)+=420.0.

Provenance & Evidence