81685-04-3

Upstream product

• 616-45-5 2-pyrrolidinon 
• 17118-70-6 (chlorocarbonyl)phenyl ketene 
• 2613-89-0 phenylmalonic acid 

Downstream Products

• 112423-07-1 11,11-Dimethoxy-7-phenyl-9-oxa-5-azatricyclo<5.2.2.0^1.5>undecan-6,8-dion 
• 112423-18-4 7-(Dimethylamino)-2,3-dihydro-6-phenyl-5-(1H)-indolizinon 
• 112423-12-8 2,3-Dihydro-7-methoxy-6-phenyl-5(1H)-indolizinon 
• 112423-24-2 1-Phenyl-12-piperidino-13-oxa-3-azatetracyclo<5.5.2.0^3.7.0^8.12>tetradecan-2,14-dion 

Relevant academic research and scientific papers

Novel 1,4-Dipolar Cycloaddition Reactions of 6-Oxo-6H-1,3-oxazin-3-ium-4-olates and of a 6-Oxo-6H-1,3-thiazin-3-ium-4-olate to Ketene Derivatives and Enamines

The reactions of the ketene derivatives 4, 7, and 9 as well as of the enamines 13 and 17 with some selected title compounds are described.In these cases either primary adducts of type 5, 14, or 20 are produced by a 1,4-dipolar cycloaddition, or subsequent eliminations proceed with formation of products of type 8, 11, 16, or 18.The 2(1H)-pyridinones 8 are formed by thermolysis of 5, whereas 15a-d are accessible on treatment of 14a-d or 20 with acid.The observed regioselectivities are compared with the results of MNDO calculations and the FMO and PMO theory.

Mesoionic Six-Membered Heterocycles, V. Reactions of 6-Oxo-6H-1,3-oxazin-3-ium-4-olates with o-Quinones and Heterocumulenes

Mesoionic 6-oxo-6H-1,3-oxazine-3-ium-4-olates (1, 7) react with o-quinones (2, 4) to give compounds 3, 5, which may result from a primary cycloaddition and subsequent loss of carbon dioxide.Phenyl isocyanate and phenylisothiocyanate react with 1h and