138415-83-5

Upstream product

• 21960-26-9 (4-methoxybenzylidene)triphenylphosphorane 
• 17071-97-5 5,6,7,8,9-pentathiabenzocycloheptene 
• 3462-97-3 (4-methoxybenzyl)triphenylphosphonium bromide 
• 186707-15-3 3-(4-methoxyphenyl)-1,2,4,5-benzotetrathiepin 

Downstream Products

• 61666-75-9 2-(4-metoxyphenyl)benzo[d][1,3]dithiole 

Relevant academic research and scientific papers

New sulfur-carbon displacement reaction and systematic desulfurization in multi-sulfur linkages of benzopentathiepin

Benzopentathiepin reacts with phosphorus ylides to form a mixture of benzotetrathiepins and benzotrithiins. The carbanion fragment of the phosphorus ylides replaces the one or two sulfur atoms in the multi-sulfur linkages of benzopentathiepin. Systematic desulfurization to form a new cyclic system is accomplished by the use of a combination of phosphorus ylide and triphenylphosphine in the reactions of benzopentathiepin, benzotetrathiepins, and benzotrithiins.

Convenient synthesis of 1,2,4-benzotrithiins from benzopentathiepin with phosphorus ylide

Novel 1,2,4-benzotrithiins were synthesized in satisfactory yields by treatment of benzopentathiepin with alkylidenephosphoranes. In this reaction, benzopentathiepin was found to serve as a 1,5-dipole synthon.