Synthesis And Characterization Of The Third Generation Spiro-dendrimers And Muilt-spiro Linear Compounds

People will have a higher quality requirement to material,information and energy,with the progress in science and the living standard.What's more,material is the precursor and foundation in the fields of industry and technology.As a foundation,new materials always speed up rebuilding different technologies and traditional industries.One kind of new material also brings the huge changes in technology,economy and even the whole world.The spiro-compounds have a wide range between function and their applications,because of its unique structure.As the study on the spiro-compounds become much deeper,more and more advantages also will be found.So the dendrimers including the spiro and the chiral multi-spiro compounds will have a better investigation and application in the future.In the meantime,the development and progress of our society will be speeded up.The thesis was made up of several parts as follows:1.The dendritic compound(17) including the spiro was prepared.Firstly,compound(1) and(6) was prepared using the 4-(1,4-dioxaspiro[4.5]decan-8-yl) cyclohexanone as the raw material.And then compound(9) was also prepared using the 1H-in dene-1,3(2H)-dione prepared according to the reference.Secondly,compound(16) was synthesized by the reaction of compound(1) with trioxymethylene in the presence of calcium hydroxide.Thirdly,2-(4-(9-(4-formylphenyl)-2,4,8,10-tetraoxaspiro[5.5]undecan-3-yl)benzylidene) malononitrile(12) was prepared using terephthalaldehyde as the raw material through four steps.Finally,compound(17) was synthesized by the reaction of(12) with(16) in the presence of acid.2.3,15-bi {8-(1,4-dioxaspiro[4.5]decyl)}-7,11,18,21-tetraoxatrispiro[5.2.2.5.2.2]heneicosane (18),3,15-(4-(bicyanomethylenecyclohexyl))-7,11,18,21-tetraoxatrispiro[5.2.2.5.2.2]heneicos ane(19) and 3,15-poly{7,11,18,21- tetraoxatrispiro[5.2.2.5.2.2]heneicosane(20) including chiral axis were prepared separately,and then 7,11,18,21-tetra- oxatrispiro[5.2.2.5.2.2]heneicos ane(21) was also prepared according to the reference.At last,the ~1HNMR law of multi-spiro chiral compounds was investigated in the thesis.3.2,2,6,6-tetrahydroxymethylcyclohexanol(22),2,2,3,3,5,5,6,6-octohydroxymethylcy-1,4-c yclohexanediol(23) and 3,3,3',3',5,5,5',5'-octohydroxymethylcy-4,4'-bicycloh-exanediol(24) were prepared separately following several acetal compounds synthesized by(22),(23) and (24).The compounds was characterized by IR,~1H-NMR et al.