64978-82-1

Upstream product

• 94079-08-0 6-Methyl-2-(2-phenyl-2-oxoethyl)thio-4-phenylthiopyryliumbromid 
• 4467-33-8 6-methyl-4-phenyl-2H-pyran-2-one 
• 94079-06-8 6-Methyl-4-phenyl-2H-thiopyran-2-thion 
• 94079-26-2 6-Methyl-4-phenyl-2H-pyran-2-thion 
• 94079-04-6 6-Methyl-4-phenyl-2H-thiopyran-2-on 
• 94079-12-6 2-(6-Methyl-4-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.