Sodium hydride → 2-Chloro-5-[[2-(nitromethylene)-3-thiazolidinyl]methyl]pyridine

2-Nitromethylenethiazolidine (2.9 g) was dissolved in dry acetonitrile (30 ml), and 60% sodium hydride (0.9 g) was added at room temperature in a stream of nitrogen. Subsequently, the mixture was stirred at room temperature until the generation of hydrogen ceased. Then, a solution of 2-chloro-5-pyridylmethyl chloride (3.2 g) in dry acetonitrile (5 ml) was added at room temperature, and the mixture was stirred at room temperature for 1 day. Acetonitrile was then distilled off under reduced pressure, and dichloromethane was added to the residue. The mixture was then washed with water. Dichloromethane was distilled off from the dichloromethane layer. The remaining oil was purified by silica gel column chromatography to give the desired 3-(2-chloro-5 -pyridylmethyl)-2-nitromethylenethiazolidine (1.6 g).

1. distillationAcetonitrile was then distilled off under reduced pressure, and dichloromethane
2. additionwas added to the residue
3. washThe mixture was then washed with water
4. distillationDichloromethane was distilled off from the dichloromethane layer
5. customThe remaining oil was purified by silica gel column chromatography

ORD-Eintrag

ord-695d68ade5684dde95eafc1fe8a40cbe

Quelldatensatz

uspto-grants-1994_03

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05298507