1,4-Dioxane → HCID 10379793, compound

Participants

Reaction Steps

A stirred solution of 6.0 g of 4-chloro-β-(dimethylamino)-α-(3-methyl-2-thienoyl)-2-nitrosty rene, 50 ml of 1,4-dioxane and 10 ml of water was refluxed for 16 hr and allowed to cool. The cooled solution was concentrated, and the residue was partitioned between dichloromethane and water. The organic phase was dried over anhydrous sodium sulfate, filtered and concentrated. A stirred solution of the residue, dioxane and water was refluxed overnight and was worked-up as above. The residue was purified by preparative HPLC (Waters Associates Prep LC./Model 500, silica gel, sample applied in dichloromethane (20 ml), eluted with dichloromethane, 200 ml/min flow rate, Gow Mac Model 80-800 UV detector). The appropriate fractions were concentrated and the residue was recrystallized from 95% ethanol to give 3.03 g of product, mp 105°-107° C.

Provenance & Evidence