Photoreduction of 5-deazaflavins [1,3,9-triaza-anthracene-2(3H),4(10H)-diones]
Abstract
Prolonged illumination of 8-X-5-deazaflavins (X = NH2 or NMe2) in the presence of triethanolamine as electron donor leads to the formation of 6,7-dihydro-8-X-5-deazaflavins, while using ethylenediaminetetra-acetate or oxalate as electron donor, besides the 6,7-dihydro compound the dimeric product 5,5′-bis(1,5-dihydro-3-carboxymethyl-8-X-5-deazaflavin) is formed.