Electrosynthesis of 2,2′,6,6′-tetraaryl 4,4′-bipyrannylidenes with eight flexible chains

✍ Scribed by Christian Amatore; Anny Jutand; Fernando Pflüger; Colette Jallabert; Hélèna Strzelecka; Michèle Veber

• Book ID: 104229623
• Publisher: Elsevier Science
• Year: 1989
• Tongue: French
• Weight: 304 KB
• Volume: 30
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(00)99471-1

✦ Synopsis

2,2',6,6'-tetraaryl 4,4'-bipyrannylidenes with eight flexible chains are synthesized by electrochemical reduction of the corresponding 2,6-diarylpyrylium salts. 2,2*,6,6'-tetraaryl 4,4'-bipyrannylidene 1 can be synthesized by chemical reduction of 2,6 pyrylium salts 2 with zinc powder.

At --*lM *r -1 -Ar Ad&A, '-2 This process reported' for Ar=C6H5, X=ClO4-has been generalized to many other pyrylium salts 2 phenyls, 2,3