Sodium borohydride → 2-Benzyl-1,2,3,3a,7,7a-hexahydro-4-thia-2-aza-cyclopenta[alpha]pentalen-7-ol

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Reaction Steps

NaBH4 (1664 mg, 44 mmol) was added in portions to a solution of the product of step e) (1183 mg, 4.40 mmol) in methanol at 0° C. The reaction mixture was allowed to come to room temperature and was stirred overnight. The solvent was evaporated and the residue was diluted with brine (50 ml) and extracted with ethyl acetate (2×50 mL). The combined organic extracts were dried with MgSO4 and solvent evaporated in vacuo to afford the subtitle compound (1192 mg, quantitative conversion) that was used without further purification. MS calculated for C16H17NOS +H: 272, observed: 272.

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