2 April 1996 Cyanopurpurins: synthesis from meso-(2-cyanovinyl)porphyrins
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Porphyrin derivatives substituted at a meso-position with a (2-cyanovinyl) group were synthesized from (2-formylvinyl) porphyrins. Demetallation and subsequent cyclization produced the corresponding cyanopurpurins. All cyanopurpurin derivatives show strong band I absorptions at 692 nm.
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Byron C. Robinson, Byron C. Robinson, Alan R. Morgan, Alan R. Morgan, } "Cyanopurpurins: synthesis from meso-(2-cyanovinyl)porphyrins", Proc. SPIE 2675, Optical Methods for Tumor Treatment and Detection: Mechanisms and Techniques in Photodynamic Therapy V, (2 April 1996); doi: 10.1117/12.237538; https://doi.org/10.1117/12.237538

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