Pub No:
93
Title:
The Synthesis of Porphyrins via Dipyrromethenes
Authors:
Paine, J.B., Chang, C.K., and David Dolphin
Journal:
Heterocycles
Year:
1977
Pages:
7, 831-838
Abstract:
Porphyrins I (R = Me, Et, Ph, C12H25, R1 = Me, R2 = CO2Me; R = R1 = Et, R2 = CO2Me; R = Me, Et, Ph, R1 = Me, R2 = H; R = Me, R1 = Et, R2 = H) were prepared in 28-39.5% yield by condensing the dipyromethenes II with III in the presence of HCO2H-Br. Both II and III were prepared from IV (R3 = R, CH2CH2 R2).

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