Influence of N,N?-Substituents on the FeCl3-Catalyzed Photo-oxidation of 2,5-Dibenzylpiperazine-3,6-Diones
作者:Michel Barbier
DOI:10.1002/hlca.19860690118
日期:1986.2.5
Reactions carried out on benzoyl (2) and hydroxybenzyl (10) derivatives of L-phenylalanine-cycloanhydride 1 lead to the conclusion that the structure 3, previously proposed for picroroccellin (a metabolite from the lichen Roccella fuciformis), should be revised to 6, While the FeCl3-catalyzed photo-oxidation of 1 gives 2, the N,N′-dimethyl derivative 7 leads to N,N′-dimethyl-2-benzylpiperazine-3,5,6-trione
对L-苯丙氨酸-环酐1的苯甲酰基(2)和羟基苄基(10)衍生物进行的反应得出的结论是,先前建议用于picroroccellin(地衣Roccella fuciformis的代谢物)的结构3应该修改为6,当FeCl 3催化的1的光氧化反应得到2时,N,N'-二甲基衍生物7生成N,N'-二甲基-2-苄基哌嗪-3,5,6-三酮(9)。ñ,ñ'-二乙酰基-L-苯丙氨酸-环酐11保持不变。已经确定,在所报道的条件下,2,5-二苄基哌嗪-3,6-二酮的N,N′-取代极大地影响了它们的光氧化。