Bicyclo[2.2.1]heptane-1-methanesulfonic acid, 7,7-dimethyl-2-oxo-, (1S)- → HCID 66744049, compound

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Reaction Conditions

Reaction Steps

A mixture of 3-amino-5-(5-methyl-1H-pyrazol-4-yl)thiophene -2-carboxamide (100 mg, 0.450 mmol), 4-{[tert-butyl(dimethyl) silyl]oxy}cyclohexanone (0.339 mL, 1.35 mmol), CSA (10.5 mg, 0.0450 mmol), MgSO4 (108 mg, 0.900 mmol) in anhydrous DMA (1.5 mL) was stirred at 90° C. for 1 h. The mixture was partitioned between EtOAc (20 mL) and aqueous NaHCO3 (10 mL). The aqueous layer was extracted with EtOAc (5 mL). The combined organic layers were washed with brine (5 mL), dried over Na2SO4 and concentrated under reduced pressure. The residue was purified by column chromatography (Purif, silica gel, 30:70 hexane/EtOAc to EtOAc) to give 4-{[tert-butyl(dimethyl)silyl]oxy}-6′-(5-methyl-1H-pyrazol-4-yl)-1′H-spiro[cyclohexane-1,2′-thieno[3,2-d]pyrimidin]-4′(3′H)-one as a pale yellow oil.

Provenance & Evidence