Improved synthesis of meso substituted 21-Oxa and 21-Thia tetra phenyl porphyrins

✍ Scribed by Alagar Srinivasan; Bashyam Sridevi; Mereddy Venkat Ram Reddy; Seenichamy Jeyaprakash Narayanan; Tavarekere K. Chandrashekar

• Book ID: 104257168
• Publisher: Elsevier Science
• Year: 1997
• Tongue: French
• Weight: 233 KB
• Volume: 38
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(97)00807-1

✦ Synopsis

An efficient method for the exclusive formation of 21-Oxa and 21-Thia tetra phenyl porphyrins in high yields by condensation of dipyrromethane and furan or thiophene dials is described. 0 1997 Elsevier Science Ltd. Core modified tetraaryl porphyrins containing hetero atoms are receiving attention in recent years'. Core modification results in altered electronic structure leading to interesting opticallb, photochemical2*3 and electrochemical',3 properties. Synthetic methods available presently for the preparation of such compounds makes use of acid catalysed condensation of thiophene or furan diols with pyrrole and benzaldehyde4.

2 4 4a X=S 4b X=0 1. BF3.0Et2 2. Chloranil