Methanesulfonyl chloride → (2R,3R,4S)-6-methanesulfonylamino-3,4-dihydro-3-hydroxy-2-dimethoxymethyl-2-methyl-4-(2-thioxobenzoxazol-3-yl)-2H-1-benzopyran

Participants

Reaction Steps

90 mg (0.22 mmol) of the compound prepared in Example 17 was dissolved in 1 ml of dichloromethane, to which 58 μl (0.34 mmol) of methanesulfonyl chloride and 17 μl (0.22 mmol) of diaisopropylethylamine were added. The reaction was stirred for 10 hours at room temperature, 67 mg (yield: 64%) of the target compound was obtained through reaction accomplished by the same procedure as used in Example 33.

Provenance & Evidence