Synthesis of organometallic amines and their coupling to the C-terminus of amino acids and peptides
作者:Alexandra Hess、Oliver Brosch、Thomas Weyhermüller、Nils Metzler-Nolte
DOI:10.1016/s0022-328x(99)00304-6
日期:1999.10
solution. For the glycine derivative 4a the activation energy was determined to be 70.3 kJ mol−1 by 1H-NMR spectroscopy. All new compounds were completely characterised spectroscopically including 15N-NMR by indirect detection 2D 1H-15N-NMR. The potential difference of ca. +50 mV between ferrocene derivatives 2 and the ferrocenyl amino acids 4 in cyclic voltammetry was used to monitor the peptide coupling
这项工作描述了使用有机金属胺标记氨基酸和肽的C端。N-取代的二茂铁-甲胺2可以容易地制备并且以良好的产率偶联至多种氨基酸。新的二茂铁氨基酸衍生物4在溶液中以两种构象存在,它们在叔酰胺键的取向上不同并且在溶液中缓慢地相互转化。对于甘氨酸衍生物4a,通过1 H-NMR光谱确定活化能为70.3kJ mol -1。通过间接检测2D 1对所有新化合物进行光谱鉴定,包括15 N-NMRH - 15 N-NMR。约的电位差。在循环伏安法中,二茂铁衍生物2和二茂铁氨基酸4之间的+ 50mV被用于原位监测肽偶联反应。还描述了尝试合成苯铬三羰基和η-环戊二烯基二羰基钼的有机金属胺衍生物的尝试。合物CpMo(CO)的固态结构2 C 2 ħ 4 N(CO)2 C ^ 6 ħ 4 14和CpFeC 5 ħ 4 CH 2 NHCH 2 - p -CH 3C 6 ħ 4 2A(CP:η环戊二烯基),通过单晶X射线衍射来确定。