Synthetic Approaches to 3-Amino-1,4-naphthoquinone-2-carboxylic Acid Derivatives and Photochemical Synthesis of Novel 1,4,5,10-Tetrahydro-5,10-dioxo-2H-naphth(2,3-d)(1,3)oxazine Derivatives.
作者:Shunsaku OHTA、Yasunari HINATA、Masayuki YAMASHITA、Ikuo KAWASAKI、Takaaki SHOJI、Hisayo YOSHIKAWA、Yoshiki OBANA
DOI:10.1248/cpb.42.1185
日期:——
because of its instability, the esters (18a, b) of 2a could be prepared. 2-Alkylamino-3-hydroxymethyl-1,4-naphthoquinones (9a-g) were photochemically cyclized to the 1,4,5,10-tetrahydro-5,10-2H-naphth[2,3-d][1,3]oxazines (19a-g), containing a novel heterocyclic ring system in moderate yields. Anti-bacterial activity of the prepared compounds was weak or insignificant.
尝试合成3-烷基氨基-1,4-萘醌-2-羧酸(2)。尽管未获得3-(1-哌啶基)-1,4-萘醌-2-羧酸(2a),但可能由于其不稳定性,可以制备2a的酯(18a,b)。将2-烷基氨基-3-羟甲基-1,4-萘醌(9a-g)光化学环化为1,4,5,10-四氢-5,10-2H-萘[2,3-d] [1, 3]恶嗪(19a-g),含有中等产率的新型杂环系统。制备的化合物的抗菌活性弱或可忽略不计。