Differential reactivity pattern for the condensation reactions of copper(II) complexes of DL- and L-amino acids
作者:Chepuri R. K. Rao、Navamoney Arulsamy、Panthappally S. Zacharias、Derek J. Hodgson
DOI:10.1039/dt9930003581
日期:——
The condensation reactions of copper(II) complexes of DL and L forms of alanine, serine and threonine with aliphatic aldehydes reveal differential reactivity for the bis(amino acidato)copper(II) complexes. The reaction of [Cu(DL-ala)2](where ala = alaninato anion) with formaldehyde and ammonia, at an acidic pH of 5, yields a pentamethylenediaza group containing product, [(αR,α′S)-N3N7-(1,3,5,7-tetraazabicyclo[3
DL和L形式的丙氨酸,丝氨酸和苏氨酸的铜(Ⅱ)配合物与脂族醛的缩合反应表明双(氨基酸基)铜(Ⅱ)配合物具有不同的反应性。的反应物[Cu(DL-ALA)2 ](其中ALA = alaninato阴离子)与甲醛和氨,以5的酸性pH值,得到含有产物的一个pentamethylenediaza基,[(α [R,α'小号) - ñ 3 N 7-(1,3,5,7-四氮杂双环[3.3.1]壬烷)二(2-甲基乙酰基)]铜(II)1,但在更高的pH条件(pH> 8.0)下,会产生已知的含恶唑烷基团的产品diaquabis(4-methyloxazolidine-4-carboxylato)-copper(II)2。然而,已知[Cu(L- ala)2 ]与甲醛和氨在pH 8.5下的反应产生的光学活性异构体为1,即。[(αS,α ′S)-N 3,N 7-(1,3,5,7-四氮杂双环-[3.3.1]壬烷)二(2-