Sodium hydride → HCID 86586358, compound

Participants

Reaction Steps

To a suspension of 0.44 g (11 mmole) of 60% sodium hydride/mineral oil dispersion in 100 mL of DMF was add 1.8 g (10 mmole) of diethyl cyanomethylphosphonate. The mixture was stirred for 30 minutes at room temperature under nitrogen and then 3.0 g (7.6 mmole) of [(2R)-8-formyl-7-nitro-2,3-dihydro-1,4-benzodioxin-2-yl]methyl 4-methylbenzenesulfonate added and stirring at room temperature continued overnight. The solvent was then removed in vacuum and replaced with 400 mL of dichloromethane. The solution was washed with 300 mL portions of water and saturated brine, dried over sodium sulfate, filtered and concentrated in vacuum to a yellow oil. This was column chromatographed on silica gel with methylene chloride as eluant to give 2.5 g of the (R)-enantiomer of the title compound as a yellow solid (m.p. 117-118° C.).

Provenance & Evidence