title: Nitrogen extrusion from pyrazoline-substituted porphyrins and chlorins using long wavelength visible light.
abstract: Protoporphyrin reacts with diazomethane to give pyrazolines which at long wavelength (approximately 630 nm) extrude nitrogen to give the corresponding cyclopropyl derivatives.
authors.affiliation: Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, B.C., Canada.
authors.forename: Angela
authors.initials: A
authors.lastname: Desjardins
authors.forename: Jeffery
authors.initials: J
authors.lastname: Flemming
authors.forename: Ethan D
authors.initials: ED
authors.lastname: Sternberg
authors.forename: David
authors.initials: D
authors.lastname: Dolphin
mesh_terms: D003432:Cross-Linking Reagents / Q000138:chemical synthesis / Q000737:chemistry; D008027:Light; D009584:Nitrogen / Q000737:chemistry*; D010778:Photochemotherapy; D017319:Photosensitizing Agents / Q000138:chemical synthesis / Q000737:chemistry; D011166:Porphyrins / Q000138:chemical synthesis / Q000737:chemistry*; D011720:Pyrazoles / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D003432:Cross-Linking Reagents; D017319:Photosensitizing Agents; D011166:Porphyrins; D011720:Pyrazoles; C006969:chlorin; D009584:Nitrogen