35150-26-6

Upstream product

• 130721-70-9 3-Oxo-3-phenyl-2-pyrrolidin-(2E)-ylidene-propionic acid methyl ester 
• 470-27-9 diethyl aziridin-1-ylphosphonate 
• 93-91-4 1-phenylbutan-1,3-dione 
• 64944-81-6 1-phenyl-2-(pyrrolidin-2-ylidene)butane-1,3-dione 
• 70-11-1 α-bromoacetophenone 

Downstream Products

• 1357027-08-7 4-(4-methylphenyldiazenyl)-1,1,3-triphenyl-6,7-dihydro-5H-pyrrolo[1,2-c][1,3,2λ4]oxazaborine 
• 1357027-20-3 4-benzoyl-2-(4-methylphenyl)-1,1-diphenyl-2,5,6,7-tetrahydro-1H-pyrrolo[1,2-d][1,2,4,3λ4]triazaborine 

Relevant academic research and scientific papers

Reactions of N-phosphorylated aziridines with dianions derived from ethyl acetoacetate and 1,3-diketones: New route to substituted pyrrolines and pyrrolidines

The nucleophilic ring-opening of N-(diethoxyphosphoryl)aziridines by the dianions derived from ethyl acetoacetate and 1,3-diketones has been studied. Acid-mediated cyclisation and dephosphorylation of the resulting products to a number of substituted pyrrolines and pyrrolidines has been also investigated.

A new bicyclic oxazaborines with a bridged nitrogen atom, their thermic rearrangement and fluorescence properties

Cyclic β-enaminones bearing secondary amino group react with 4-substituted benzenediazonium tetraphenylborates in dichloromethane to form substituted bicyclic [1,3,2λ4]oxazaborines The oxazaborines rearrange, on heating to 200 °C in the absence of solvent or in DMF or DMSO, to isomeric 2H-[1,2,4,3λ4]triazaborines. Previously prepared [1,3,2λ4]oxazaborines derived from acyclic β-enaminones bearing secondary amino group either did not undergo the rearrangement or with a lot of difficulties and with negligible yield. The fluorescence behaviour of the prepared triazaborines was observed. These compounds fluoresce in 2-methyltetrahydrofurane and in solid state under low temperatures.

Boric acid: a new regiospecific decarboxylating agent. Syntheses of cyclic imines, β-enaminones, and β-enaminodiketones from β-enaminoesters

The synthesis of cyclic imines 2, β-enaminones 6, and β-enaminodiketones 7 is described.Regio- and stereospecific thermolysis of β-enaminoesters 4 with boric acid permit these preparations in generally good yields. Key words: boric acid, cyclic β-enaminoesters, decarboxylation, cyclic imines, cyclic β-enaminones.

Unusual Acid-Catalyzed Rearrangement of Two α,α'-Diimino-oximes

2-pyrrolidines (vinamidines, 3-6) were obtained either via activation of the corresponding vinilogous amide 1 with Meerwein salt and subsequent treatment of the intermediate 2 with an amine, or more directly by acid-cata