1,3,9,11,12,14-Hexa-azapentacene-2,4,8,10(3H,9H,12H,14H)-tetraones (doubled 5-deazaflavins) with potential for oxido reduction
作者:Fumio Yoneda、Masakazu Koga
DOI:10.1039/p19880001809
日期:——
ils (4) gave the 1,5-dihydro doubled 5-deazaflavins (5) and 8-(5-formyluracil-6-yl)amino-1,5-dihydro-5-deazaflavins (6). The dehydrogenation of compounds (5) with diethyl azodicarboxylate or the dehydrative cyclization of compounds (6) with Vilsmeier reagent gave the corresponding 1,3,9,11,12,14-hexa-azapentacene-2,4,8,10(3H,9H,12H,14H)-tetraones(doubled 5-deazaflavins)(8). The latter exhibited strong
8-(取代的氨基)1,5-二氢-5-脱氮黄素(3)与6-氯-5-甲酰尿嘧啶(4)的缩合得到1,5-二氢加倍的5-脱氮黄素(5)和8-( 5-甲酰基尿嘧啶-6-基)氨基-1,5-二氢-5-脱氮黄素(6)。用偶氮二羧酸二乙酯对化合物(5)进行脱氢或用Vilsmeier试剂对化合物(6)进行脱水环化,得到相应的1,3,9,11,12,14-六氮杂并五苯-2,4,8,10(3 H,9 H,12 H,14 H)-四酮(5-脱氮黄素的倍数)(8)。后者表现出强烈的向环戊醇的自动循环氧化作用,在氧气气氛下的日光下,生成环戊酮。