TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The acylating step is carried out by reacting the dipyrromethane or 1-monoacyldipyrromethane with a compound of formula R3COX1 to form the mixed reaction product comprising a 1,9-diacyldipyrromethane acylated at the 1 and 9 positions with R3CO- or by reacting the dipyrromethane or 1-monoacyldipyrromethane with an acid chloride and a Grignard reagent, an active ester or a Vilsmeier reagent to form the mixed reaction product comprising a 1,9-diacyldipyrromethane. The acylating step is carried out with a dipyrromethane which is then acylated at the 1 and 9 position to produce the 1,9-diacyldipyrromethane or with a 1-monoacyldipyrromethane, which is acylated at the 9 position to produce the 1,9-diacyldipyrromethane. (I) is immobilized on a solid support. The method further involves treating the metal complex with an acid (A1) to produce a 1,9-diacyldipyrromethane, reducing the metal complex with a reducing agent to form a diol from the 1,9-diacyldipyrromethane and then condensing the diol with a dipyrromethane to form a porphyrin ring compound.R3 = R; andX1 = halo.Preferred Components: The base is triethylamine, tributylamine, N,N-diisopropylamine, 1,8-diazabicyclo(5.4.0)undec-7-ene (DBU), 1,5-diazabicyclo(4.3.0)non-5-ene (DBN) or 2,6-di-tert-butylpyridine. (A1) is trifluoroacetic acid, trichloroacetic acid, acetic acid, HCl, p-toluene sulfonic acid. The reducing agent is NaBH4. The dipyrromethane is substituted at the 5 position with a substituent selected from H, alkyl and aryl, or a substituent selected from dipyrromethane, porphyrin, dipyrrin, and diacyldipyrromethane. EXAMPLE - A tin complex was formed by reacting 1,9-bis(4-methylbenzoyl)-5-phenyldipyrromethane with dibutyltin dichloride in the presence of triethylamine at room temperature to give corresponding dibutyltin complex 3a-Sn(Bu)2 (90%) of formula (Ia). (Ia) was reduced to the putative dicarbinol derivative of formula (Ib), using NaBH4, methyl alcohol and tetrahydrofuran. (Ib) was condensed with 5-phenyldipyrromethane in the presence of TFA (trifluoroacetic acid)/CH3CN (methyl cyanide) or InCl3/CH2CCl2, followed by oxidation with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) to form a porphyrin compound of formula (Ic) (28%).