A convenient synthesis of meso-substituted porphyrins
β Scribed by David Harris; Alan W. Johnson; Richard Gaete-Holmes
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- English
- Weight
- 561 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0045-2068
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## Abstract Acidβcatalyzed condensation of __meso__βpentafluorophenyl dipyrromethane **1** (100 mM) and pentafluorobenzaldehyde **2** (100 mM) at 0 Β°C gave a series of expanded porphyrins with even number of pyrrolic subunits up to octadecaphyrin(1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1) **18** in impro
The use of two orthoesters, trimethyl orthoacetate and trimethyl orthobenzoate, in the synthesis of porphyrins from 5-phenyldipyrromethanes is described. Previously unreported 5,15-diphenyl-10,20-dimethyl porphyrins can be accessed conveniently by this route. A relationship between the steric bulk o