The search for potential inhibitors that target so far unexplored bacterial enzyme mono-N-succinyl-L,Ldiaminopimelic acid desuccinylase (DapE) has stimulated a development of methodology for quick and efficient preparation of mono-N-acylated 2,6-diaminopimelic acid (DAP) derivatives bearing the different carboxyl groups or lipophilic moieties on their amino group.
Enantiomerically Pure α-Amino Acid Synthesis via Hydroboration−Suzuki Cross-Coupling
作者:Philip N. Collier、Andrew D. Campbell、Ian Patel、Tony M. Raynham、Richard J. K. Taylor
DOI:10.1021/jo010865a
日期:2002.3.1
compound 25 undergo hydroboration with 9-BBN-H followed by palladium-catalyzedSuzukicoupling reactions with aryl and vinyl halides. After one-pot hydrolysis-oxidation, a range of known and novel nonproteinogenic amino acids were isolated as their N-protected derivatives. These novel organoborane homoalanine anion equivalents are generated and transformed under mild conditions and with wide functional
Structural diversification of phenylspirodrimane lactams by employing a biosynthetic intermediate
作者:Jimei Liu、Zhenfei Wang、Jun Wu、Yaotian Han、Fei Ye、Tiantai Zhang、Haibo Yu、Zhengshun Wen、Jungui Dai
DOI:10.1016/j.cclet.2023.108363
日期:2023.3
especially for the lactam derivatives consisting a γ-lactam moiety and N-linked side chains. These compounds were derived from multi-step combination of enzymatic and non-enzymatic conversions of intermediates in their biosynthetic pathways. Stachbotrydial (2) with an o-phthalaldehyde unit was supposed as the high-reactivity intermediate of phenylspirodrimane lactams via nonenzymatic reaction with
苯基螺环烷是一类结构多样性和复杂性的小萜类化合物,具有广泛的生物学特性,特别是由γ-内酰胺部分和N-连接侧链组成的内酰胺衍生物。这些化合物源自其生物合成途径中中间体的酶促和非酶促转化的多步骤组合。带有邻苯二甲醛单元的Stachbotrydial ( 2 )被认为是苯基螺环烷内酰胺的高反应性中间体与胺发生非酶促反应。在目前的工作中,通过在真菌Stachybotrys Chartarum培养物中添加结构上不同的单胺和二胺,开发了一种有效的非酶多样化策略,用于苯基螺环内酰胺的结构多样化,包括 2 的单体和二聚体。总共合成了24 个苯基螺环内酰胺 ( 1, 3 – 25 ),其中包括 18 个新化合物。其中,生产了具有生物活性的苯基螺环烷内酰胺二聚体stachybocin A ( 1 ),产量为18.7mg/g细胞干重。通过大量的光谱数据阐明了这些化合物的结构、单晶 X 射线衍射 (Cu Kα) 和计算的电子圆二色性
Gelating polypeptide matrices based on the difunctional
<i>N</i>
‐carboxyanhydride diaminopimelic acid cross‐linker
作者:Robert D. Murphy、Elena Bobbi、Fernando C. S. Oliveira、Sally‐Ann Cryan、Andreas Heise
DOI:10.1002/pola.29376
日期:2019.6
This work reports the synthesis of a new difunctional N‐carboxyanhydride (NCA) monomer, namely diaminopimelic acid (DAP), and its use in the one‐pot preparation of an organogelating copolypeptide. The organogel is formed in situ through ring‐opening polymerization (ROP) of DAP NCA from helical poly(ε‐carbobenzyloxy‐L‐lysine) (PZLL) blocks in a mixture of dimethylformamide/chloroform. Gelation occurs
The asymmetric synthesis of both the enantiomers of 2,6-diaminopimelic acid (2,6-DAP) has been accomplished starting from the chiral synthon 1. (C) 2000 Elsevier Science Ltd. All rights reserved.