Sodium hydride → 2-(Methylsulfonyl)-2,3-dihydropyrano[3,2-e]isoindol-1(7h)-one

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Reaction Steps

To a solution of 2,3-dihydropyrano[3,2-e]isoindol-1(7H)-one (71) (500 mg, 2.67 mmol) in THF (35 ml) was added NaH (95%, 87 mg, 3.47 mmol) in portions. Resulting mixture was stirred for 40 min before adding MeSO2Cl by syringe. Stirring was continued for 1 hour. The solvent was removed in vacuo and the residue was portioned with CH2Cl2. The organic solution was washed with H2O, sat. NaCl and dried over Na2SO4. Concentration in vacuo gave the title compound (95) as a solid (490 mg, 69%). MS (ES) m/z 266.0.

Provenance & Evidence