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以焦脱镁叶绿酸-a甲酯为起始原料,通过对3-位乙烯基的氧化、格氏反应和E-环的空气氧化和重排在二氢卟吩周环的不同位置上构建酰基结构,利用叶绿素-a衍生物的烷酰基和叶绿素-b的原有甲酰基与丙二腈进行Knoevenagel反应,完成一系列具有长波吸收的β,β-二氰亚甲基叶绿素-a衍生物的合成,并对不同取向的共轭取代基团对大环分子的可见光谱所产生的影响进行了相应的讨论.未见报道的叶绿素-a衍生物均经UV,IR,1H NMR及元素分析证明其结构.
With pyropheophorbide-a methyl ester as a starting material, through the 3-position vinyl oxidation, Grignard reaction and the E-ring air oxidation and rearrangement in the different positions of the chlorin cycle Construction of acyl structure, the use of chlorophyll-a derivative of the alkanoyl and chlorophyll-b original formyl and malononitrile Knoevenagel reaction completed a series of long-wave absorption of β, β-dicyanomethylene chlorophyll-a derived The synthesis of these compounds and their influence on the visible spectra of the macrocyclic molecules were also discussed.Unreported chlorophyll-a derivatives were characterized by UV, IR, 1H NMR and elemental analysis Analysis to prove its structure.