Monocyclic β-lactams related to nocardicins were enantioselectively synthesized from phthal-imidoacetyl chloride and hexahydro-1, 3, 5-triazines (4) via a [2+2] cycloaddition reaction. The preparation and biological activity of some typical acyl derivatives are also described.
Synthesis of Enantiopure Pyrrolidine-Derived Peptidomimetics and Oligo-β-peptides via Nucleophilic Ring-Opening of β-Lactams
作者:Alberto Macías、Antonio Morán Ramallal、Eduardo Alonso、Carlos del Pozo、Javier González
DOI:10.1021/jo061189l
日期:2006.9.1
The synthesis of the two enantiomers of pyrrolidine-derived spiro β-lactams by resolution with d- and l-Boc phenylalanine is described. The potential of these optically active spiro β-lactams on the synthesis of peptidomimetics as analogues of melanostatin is evaluated. Theoretical studies of several models, at the Becke3LYP/6-31+G* level of theory, together with previous experimental evidences from
d-和l拆分可合成吡咯烷衍生的螺β-内酰胺的两种对映体描述了-Boc苯丙氨酸。评估了这些旋光性螺旋β-内酰胺类在合成拟肽作为黑色素抑制素类似物方面的潜力。在Becke3LYP / 6-31 + G *的理论水平上对几种模型进行的理论研究,以及通过NMR收集的来自我们小组的先前实验证据,使我们能够设计能够有效模拟某些具有生物活性的肽型分子的结构。另一方面,螺-β-内酰胺已显示出其在制备β-肽中的效用。例如,合成高四-β-肽。为了获得具有潜在生物活性的更高的肽,这项研究将在未来继续进行。
Synthesis of monocyclic .beta.-lactams by the photolytic reaction of chromium carbene complexes with s-1,3,5-triazines
作者:Louis S. Hegedus、Stan D'Andrea
DOI:10.1021/jo00248a039
日期:1988.6
Synthesis of optically active .beta.-lactams by the photolytic reaction of imines with optically active chromium carbene complexes. 2. Synthesis of 1-carbacephalothin and 3-ANA relays
作者:Y. Narukawa、K. N. Juneau、D. Snustad、D. B. Miller、L. S. Hegedus
DOI:10.1021/jo00046a030
日期:1992.9
A relay (3) to optically active 1-carbacephalothin (4) was prepared in modest yield with high stereoselectivity by the photochemical reaction of optically active chromium carbene complex 1 with functionalized imine 2. In contrast, the photochemical reaction of carbene complex 1 with imine precursors 15a,b to the nocardicins was much less stereoselective.
HEGEDUS, LOUIS S.;DANDREA, STAN, J. ORG. CHEM., 53,(1988) N 13, 3113-3116