Sodium hydride → HCID 69026216, compound

Participants

Reaction Steps

300 mg of 3-methylsulfonyl-5-(2-norbornyl)-1,2,4-thiadiazole and 107 mg of 2-pentyn-1-ol were dissolved in 2.5 g of N,N-dimethylformamide, 60 mg of sodium hydride (60% in oil) was added thereto under ice-cooling, and the reaction mixture was stirred for 30 minutes under ice-cooling and for 1 hour under room temperature. Then, the reaction mixture was added to saturated brine, and extracted with t-butyl methyl ether. The organic layer was concentrated under reduced pressure, and the residue obtained was subjected to silica gel column chromatography to give 5-(2-norbornyl)-3-(2-butynyloxy)-1,2,4-thiadiazole. 150 mg of the exo-isomer having low polarity (hereinafter referred to as the present invention compound (9-1)) and 50 mg of the endo-isomer having high polarity (hereinafter referred to as the present invention compound (9-2)) were obtained by using hexane-ethyl acetate system as a carrier solvent.

Provenance & Evidence