Facile acid-promoted decarboxylation of a macrocyclic complex. Crystal structure of [6,14-diacetyl-7,13-dimethyl-1,4,8,12-tetraazacyclopentadeca-1(15),5,7,13-tetraen-2-olato]nickel(II)
作者:James H. Cameron、Catherine A. Clarke、Heather B. Harvey、Kevin J. McCullough、Peter A. Rudolf
DOI:10.1039/dt9960001513
日期:——
A new chiral tetradentate compound has been prepared from (S)-2,3-diaminopropanoic acid and 3-ethoxymethylenepentane-2,4-dione and the corresponding nickel(II) and palladium(II) complexes have been characterized. The racemic form of the nickel(II) complex underwent template-controlled ring closure with 1,3-diaminopropane to form a new 15-membered carboxylato-substituted macrocycle. In the presence of acid, this species underwent an unusual and facile oxidative-decarboxylation reaction to produce a new hydroxy-substituted macrocycle, the crystal structure of which has been determined.
由(S)-2,3-二氨基丙酸和 3-乙氧基甲基-2,4-戊二酮制备了一种新的手性四价化合物,并对相应的镍(II)和钯(II)配合物进行了表征。外消旋形式的镍(II)配合物与 1,3-二氨基丙烷发生了模板控制的闭环反应,形成了一个新的 15 元羧基取代大环。在酸的作用下,该复合物发生了不寻常的简单氧化脱羧反应,生成了一个新的羟基取代大环,其晶体结构已经确定。