用与C和D吡咯亚基连接的乙酸酯或丁酸酯基制备了卟啉原III的类似物。相应的卟啉甲酯是通过在氢溴酸存在下使二吡咯基甲烷与吡咯醛反应生成α,c-胆二烯而合成的。在DMF中用氯化铜(II)环化,然后用15%H 2 SO 4 -TFA脱金属并再酯化,以极好的收率得到所需的卟啉。用25%盐酸水解并用汞齐钠还原,得到新颖的双乙酸盐和双丁酸盐卟啉原9。双乙酸酯9a将其与鸡红细胞溶血产物(CRH)一起孵育,但由于这些制剂中存在的两种酶的共同作用,给出了复杂的结果。尿卟啉原脱羧酶(URO-D)与原卟啉原氧化酶(CPO)的分离允许评估这两种酶对双乙酸酯底物的影响。卟啉原9A证明是CPO相对差的衬底相比于天然底物粪卟啉原-III,并且仅A环丙酸酯部分被加工成显著程度。用纯化的人重组CPO孵育9a可获得相似的结果。双乙酸酯9a也是URO-D的底物,在这种情况下,卟啉原单乙酸盐是主要产品;然而,第二乙酸酯单元的一些
用与C和D吡咯亚基连接的乙酸酯或丁酸酯基制备了卟啉原III的类似物。相应的卟啉甲酯是通过在氢溴酸存在下使二吡咯基甲烷与吡咯醛反应生成α,c-胆二烯而合成的。在DMF中用氯化铜(II)环化,然后用15%H 2 SO 4 -TFA脱金属并再酯化,以极好的收率得到所需的卟啉。用25%盐酸水解并用汞齐钠还原,得到新颖的双乙酸盐和双丁酸盐卟啉原9。双乙酸酯9a将其与鸡红细胞溶血产物(CRH)一起孵育,但由于这些制剂中存在的两种酶的共同作用,给出了复杂的结果。尿卟啉原脱羧酶(URO-D)与原卟啉原氧化酶(CPO)的分离允许评估这两种酶对双乙酸酯底物的影响。卟啉原9A证明是CPO相对差的衬底相比于天然底物粪卟啉原-III,并且仅A环丙酸酯部分被加工成显著程度。用纯化的人重组CPO孵育9a可获得相似的结果。双乙酸酯9a也是URO-D的底物,在这种情况下,卟啉原单乙酸盐是主要产品;然而,第二乙酸酯单元的一些
One-pot synthesis of α-bromoesters and ketones from β-ketoesters and diketones using supported reagents system
作者:Tadashi Aoyama、Toshio Takido、Mitsuo Kodomari
DOI:10.1016/j.tetlet.2004.01.014
日期:2004.2
A simple and efficient method has been developed for the synthesis of α-bromoesters and ketonesfrom β-ketoesters and diketones in one pot using a supported reagents system, CuBr2/Al2O3–Na2CO3/Al2O3, in which β-ketoester reacts first with CuBr2/Al2O3 and the product, α-bromo-β-ketoester, reacts with Na2CO3/Al2O3 to give the final product, α-bromoesters in good yields.
已开发出一种简单有效的方法,使用支持的试剂系统CuBr 2 / Al 2 O 3 -Na 2 CO 3 / Al 2 O 3在一个锅中由β-酮酸酯和二酮合成α-溴酸酯和酮,其中β-酮酸酯首先与CuBr 2 / Al 2 O 3反应,产物α-溴-β-酮酸酯与Na 2 CO 3 / Al 2 O 3反应以高产率得到最终产物α-溴酸酯。
A Convenient Synthesis of α-Functional Alkyl Vinyl Ketones
作者:T. Ben Ayed、H. Amri
DOI:10.1080/00397919508011455
日期:1995.12
Abstract Reaction of 2-functional alkyl-1,3-diketones with 30% aqueous formaldehyde using aqueous 6-10M potassium carbonate solution as base, afforded a-functional alkylvinylketones in good yields.
AbstractFive new homorubin analogs of bilirubin with their two dipyrrinone components conjoined to (CH2)2, (CH2)3, and (CH2)4 units were synthesized with propionic acid chains shortened to acetic and elongated to butyric, and examined by spectroscopy and molecular mechanics computations for an ability to form conformation-determining hydrogen bonds. With m designating the number of conjoining CH2 units
Photoinitiator, novel compound, and photocurable composition
申请人:Lachowicz Artur
公开号:US20050256218A1
公开(公告)日:2005-11-17
A photoinitiator is provided which exhibits excellent photosensitivity, yields colorless products, and is usable in thick layer UV curable coating. A novel chemical compound is also provided which is usable for the photoinitator. Photocurable composition is also provided which has these properties. The photoinitiator consists essentially of a compound having a molecular weight of 1000 or less, and having a chemical structure represented by the following formula (1),
wherein R
3
and R
4
independently denote a specific alkyl group, and R
1
and R
2
independently denote an electron attracting group or a specific alkyl group, and weight percentage of a chemical structure element represented by the following formula (2),
which is expressed in formula (1) based on the total molecular weight of the compound, is 17% to 54% by mass.