First total synthesis and determination of the absolute configuration of 1-N-methyl-3-methylamino-[N-butanoicacid-3-(9-methyl-8-propen-7-one)-amide]-benzo[f][1,7]naphthyridine-2-one, a novel benzonaphthyridine alkaloid
作者:Chengsen Tian、Xiaozhen Jiao、Xiaoyu Liu、Renze Li、Liang Dong、Xiaojin Liu、Zhigang Zhang、Jun Xu、Minjuan Xu、Ping Xie
DOI:10.1016/j.tetlet.2012.07.011
日期:2012.9
synthesis of benzonaphthyridine alkaloid (1), a unique diazaphenathrene alkaloid isolated from mangrove-derived Streptomyces albogriseolus, was accomplished. The core structure was unequivocally constructed via several key transformations, such as Knoevenagel condensation, Curtius rearrangement, and cyclic carbamate formation–reduction sequence. The chiral unsaturated ketone acid moiety was synthesized
苯并萘啶生物碱的首次全合成(1)是一种从红树林衍生的链霉菌(Streptomyces albogriseolus)分离出的独特的二氮杂蒽烯生物碱。核心结构是通过几个关键的转变而明确构造的,例如Knoevenagel缩合,Curtius重排和环状氨基甲酸酯的形成-还原序列。手性的不饱和酮酸部分是从合成ñ -叔丁氧羰基-L-谷氨酸的γ-叔丁基酯(15)。确定绝对配置。