88656-19-3

Upstream product

• 20850-89-9 2,5-diphenyl-1,3-dithiolylium-4-olate 
• 4646-69-9 benzocyclopropene 
• 82632-20-0 1,4-diphenyl-1,4-epithio-4a,8a-methano-1H-2-benzothiopyran-3(4H)-one 

Downstream Products

• 88656-21-7 2,5-Diphenyl-3-thiabicyclo<4.4.1>undeca-1,5,7,9-tetraene-4-one 
• 88656-18-2 1,4-diphenylcycloheptathiopyran-3(5H)-one 
• 88656-17-1 1,4-diphenylcycloheptathiopyran-3(9H)-one 

Relevant academic research and scientific papers

2,5-Diphenyl-3-thiabicycloundeca-1,5,7,9-tetraene-4-one, an Eleven-?-electron Heteroannulenone, from a Mesoionic Dithiolone

The title compound (7), a potentially aromatic heterocyclic system, has been prepared from the cycloadduct of the mesoionic dithiolone (1) with benzocyclopropene.

Heterocycles by Cycloaddition. Part 9. Bridged Heteroannulenes by Cycloaddition-Extrusion-Ring-expansion Reactions of Mesoionic Compounds with Benzocyclopropene. A Methanothiazonine, a Methanothionine, and a Methanothiecinone

A methanothiazonine (13) was formed by cycloaddition-extrusion-ring expansion of benzocyclopropene with a mesoionic oxathiazoliumolate (12).The reaction with a dithioliumolate (14) gave the cycloadduct (15), from which a methanothionine (16) and a methano