中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
5-苯基联吡咯甲烷 | 5-phenyldipyrromethane | 107798-98-1 | C15H14N2 | 222.29 |
—— | phenyl-[5-[phenyl(1H-pyrrol-2-yl)methyl]-1H-pyrrol-2-yl]methanol | 352423-56-4 | C22H20N2O | 328.414 |
—— | 1-benzoyl-5-phenyldipyrromethane | 352438-53-0 | C22H18N2O | 326.398 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 1,14-bisformyl-5,10-diphenyltripyrrane | —— | C28H23N3O2 | 433.51 |
The synthesis of dipyrromethanes from pyrrole and arylglyoxylic acids in the presence of K2S2O8at 90 [Formula: see text]C is reported affording dipyrromethanes in very good yields. Unlike an excess pyrrole traditionally used in dipyrromethane synthesis, the current method uses a stoichiometric amount of pyrrole avoiding any use of Brønsted or Lewis acid. A gram scale synthesis of 5-phenyldipyrromethane is also achieved demonstrating potential scale up of dipyrromethanes using this method feasible. Subsequently, dipyrromethanes were converted to A4-tetraarylporphyrins also in the presence of K2S2O8at 90[Formula: see text]C. A direct synthesis of A4-tetraphenylporphyrin from excess pyrrole and phenylglyoxylic acid in the presence of K2S2O8 at 90[Formula: see text]C is also reported.
A novel methodology for preparation of linear oligopyrroles is presented. Synthetic protocol uses water as a solvent for acid catalysed condensation of an aldehyde or ketone with unsubstituted pyrrole. While the most procedures for the above-mentioned compounds are performed in organic solvents, or large excess of pyrrole (used as solvent), we present here a novel, mild and efficient procedure for selective preparation of linear oligopyrroles in aqueous environment. Preparation of dipyrromethanes