Über den Reaktionsverlauf zwischen α‐Trioxymethylen und Sulfurylchlorid

Epoxydiazo ketones. Synthesis and reactions

“…Irradiation of 7a. Methyl 4-Hydroxy-4-phenyl-2-butenoate (32). A solution of 500 mg (2.6 mmol) of 7a in 150 ml of methanol was irradiated in a test tube-like apparatus under a slow stream of nitrogen with a Pyrex, 450 W Hanovia medium pressure lamp in a water-cooled, test tube-like, immersion well for 30 min.…”

“…The reactions of 7a-c with hydrogen chloride gas in ether generated a-chloro ketones and opened the epoxide ring in the case of 7a and 7c. Photolysis of 7a in methanol gave methyl 4-hydroxy-4-phenyl-2-butenoate (32). Pyrolysis of 7a in refluxing methanol gave 1,1 -dimethoxy-4-phenyl-3-buten-2-one (34).…”