Synthesis and structure characterization of 12-(2，4-dinitro-phenylhydrazono)-

利用松脂制备的2-氨基-2-甲基丙醇左旋海松酸盐进行光敏氧化反应,合成左旋海松酸跨环过氧化物丁醇胺盐,经酸化、异构化、酯化等步骤得到12-羰基-8-羟基-7,8-二氢枞酸(5a)及其甲酯(5b);研究5a和5b与2,4-二硝基苯肼的缩合反应,利用紫外-可见吸收光谱、红外吸收光谱、元素分析仪、1H和13C核磁共振谱对反应产物进行结构表征。结果表明,在浓硫酸催化作用下,5a和5b与2,4-二硝基苯肼发生缩合反应,生成新的化合物12-(2,4-二硝基苯腙基)-8-羟基-7,8-二氢枞酸(6a)及其甲酯(6b);6a和6b存在一个较大π电子共轭体系,其分子结构较稳定。Abstract: 12-carboxy-8-hydroxy -7，8-dihydroabietic acid (5a) and its methyl ester (5b) was prepared through several steps，including acidification，isomerization and esterification，of 2-amino-2-methyl-1-propanol salt of levopimaric acid transannular peroxide，which was obtained from directly photo-sensitized oxidation reaction of 2-amino-2-methyl-1-propanol salt of levopimaric acid isolated from pine oleoresin. The reaction of 5a and 5b with 2，4-dinitrophenyl hydrazine were investigated，and then the products were characterized by means of UV，IR，1H NMR，13C NMR，and elemental analysis. The experimental results showed that the new compounds 12-(2，4-dinitro-phenylhydrazono)-8-hydroxy-7，8-dihydroabietic acid (6a) and its methyl ester (6b)，which have an extensive π electron conjugation and structural stability， were synthesized by a condensation reaction of 5a and 5b with 2，4-dinitrophenyl hydrazine by using concentrated sulfuric acid as catalyst.广西青年科学基金项目(桂科青0728016);广西林产化学品开发与应用重点实验室开放基金项目(GXFC0813);广西高校松香系列新产品开发人才小高地开放基金项