83469-48-1

Upstream product

• 94079-07-9 4-Methyl-2-(2-phenyl-2-oxoethyl)thio-6-phenylthiopyryliumbromid 
• 94079-05-7 4-Methyl-6-phenyl-2H-thiopyran-2-thion 
• 94079-25-1 4-Methyl-6-phenyl-2H-pyran-2-thion 
• 94079-27-3 4-Methyl-6-phenyl-2H-thiopyran-2-on 
• 4467-30-5 4-methyl-6-phenyl-2H-pyran-2-one 
• 94079-11-5 2-(4-Methyl-6-phenyl-2H-thiopyran-2-yliden)-1-phenylethanon 

Relevant academic research and scientific papers

Condensations of Indeno-1,2-dithioles Yielding Diindenothiopyran Derivatives

Indeno-1,2-dithioles 1 "dimerize" under acid catalysis by loss of two sulfur atoms to form diindenothiopyrans 2I/II.An analogous reaction is known for 3-methyl-5-phenyl-1,2-dithiolylium perchlorate (3) which condenses in glacial acetic acid/pyridine to the isomeric thiopyrans 4I/II.Reactions of 1-acyl-2-indanones 13 in acetic anhydride/perchloric acid yield the oxygen compounds 14 and 15, which are structurally analogous to 2I/2II.