A novel approach to functionalised 5,7,8,9-tetrahydropyrimido[4,5-b][1,4]diazepin-6-ones using intramolecular palladium-catalysed amidation
摘要:
The development of a novel palladium-catalysed amidation approach towards 5,7,8,9-tetrahydropyrimido[4,5-b][1,4]diazepin-6-one templates is highlighted. The route proceeds through the reaction of an amino amide, generated by 1,4-addition of an amine to an acrylamide, with 5-bromo-2,4-dichloropyrimidine and final palladium-catalysed cyclisation to provide the functionalised scaffold in up to 60% isolated yield over three steps. The route offers efficiency advantages over the previously reported nitro-reduction cyclisation approach to these molecules. It also provides alternative means to introduce bulky alkyl substituents at the amide nitrogen. The application of this route in the synthesis of a variety of analogues is described. (C) 2012 Published by Elsevier Ltd.
The invention provides novel substituted azaheterocyclic compounds compounds according to Formula (I), their manufacture and use for the treatment of hyperproliferative diseases such as cancer, inflammatory or degenerative diseases.
Rapid Elaboration of Fragments into Leads by X-ray Crystallographic Screening of Parallel Chemical Libraries (REFiL<sub>X</sub>)
作者:Matthew R. Bentley、Olga V. Ilyichova、Geqing Wang、Martin L. Williams、Gaurav Sharma、Wesam S. Alwan、Rebecca L. Whitehouse、Biswaranjan Mohanty、Peter J. Scammells、Begoña Heras、Jennifer L. Martin、Makrina Totsika、Ben Capuano、Bradley C. Doak、Martin J. Scanlon
DOI:10.1021/acs.jmedchem.0c00111
日期:2020.7.9
A bottleneck in fragment-based lead development is the lack of systematic approaches to elaborate the initial fragment hits, which usually bind with low affinity to their target. Herein, we describe an analysis using X-ray crystallography of a diverse library of compounds prepared using microscale parallel synthesis. This approach yielded an 8-fold increase in affinity and detailed structural information for the resulting complex, providing an efficient and broadly applicable approach to early fragment development.
Morsch, Monatshefte fur Chemie, 1933, vol. 63, p. 224,230,234
作者:Morsch
DOI:——
日期:——
Nifantiev, E. E.; Zavalishina, A. I.; Smirnova, E. I., Phosphorus and Sulfur and the Related Elements, 1981, vol. 10, p. 261 - 266
作者:Nifantiev, E. E.、Zavalishina, A. I.、Smirnova, E. I.