HCID 14210385, compound → HCID 14210386, compound

Participants

Reaction Conditions

Reaction Steps

To 1,2-dichlorobenzene (230 ml) at 200° C. was added 3-methyl-3-(4-mesylphenoxy)-1-butyne (130 g) dropwise over a period of 1.5 hours. The reaction mixture was stirred at 200° C. for an additional 2 hours followed by removal of 1,2-dichlorobenzene by distillation under reduced pressure. The residue was dissolved in diisopropyl ether (100 ml) and treated with activated carbon. The mixture was filtered and the filtrate afforded the precipitate, which was collected, washed with diisopropyl ether, and dried to give 2,2-dimethyl-6-mesyl-2H-1-benzopyran (77 g).

Provenance & Evidence