A copper(II)-catalyzed reaction of α-azido-N-allylamide synthetic under an oxygen atmosphere resulted in the formation of 2-formyl pyrazinones. The present transformation was characterized by the following steps: 1) 1,3-dipolar cycloaddition of the azido part onto the intramolecular alkene to give bicyclic aziridine intermediates; 2) further copper(II)-catalyzed oxygenation-oxidation of the aziridines
[EN] INHIBITORS OF HIF PROLYL HYDROXYLASE<br/>[FR] INHIBITEURS DE LA HIF PROLYL-HYDROXYLASE
申请人:MERCK SHARP & DOHME
公开号:WO2016049099A1
公开(公告)日:2016-03-31
The present invention concerns compounds of formula I or pharmaceutically acceptable salts thereof, which inhibit HIF prolyl hydroxylase, their use for enhancing endogenous production of erythropoietin, and for treating conditions associated with reduced endogenous production of erythropoietin such as anemia and like conditions, as well as pharmaceutical compositions comprising such a compound and a pharmaceutical carrier.
Asymmetric Synthesis of 3,4,6-Trisubstituted 2,5-Diketopiperazines by Using Dynamic Kinetic Resolution of α-Bromo Tertiary Acetamides
作者:Jinho Baek、Seock Yong Kang、Chan Im、Yong Sun Park
DOI:10.1002/ejoc.201301936
日期:2014.5
A new and efficient method for the asymmetric synthesis of 3,4,6-trisubstituted 2,5-diketopiperazines has been developed. The dynamickineticresolution of L-amino-acid-derived α-bromo tertiary amides in the nucleophilicsubstitution reaction with p-anisidine and a subsequent deprotection-cyclization process provides rapid access to diverse cis-2,5-diketopiperazines 5a–5o and proline-containing trans-2
Rhodium-catalyzed coupling of α-lactams with indole derivatives
作者:Hannah K. Box、K.G. Upul Kumarasinghe、Radhika R. Nareddy、Gopalakrishna Akurathi、Amarraj Chakraborty、Babatunde Raji、Gerald B. Rowland
DOI:10.1016/j.tet.2014.10.049
日期:2014.12
for the formation of a C–N bond between the C–3 carbon of α-lactams and the nitrogen atom of indoles. A general procedure for the coupling of indoles and α-lactams in only 25 min with high yield is reported. The scope of the reaction was extended by the development of a method for the in situ generation of less stable phenyl-substituted α-lactams. The developed method provides an atom-economical method
1,3-Dipolar character of six-membered aromatic rings. Part 52. 2π+ 8π Cycloaddition reactions of 1-substituted 3-oxidopyridinium betaines
作者:Alan R. Katritzky、Alan T. Cutler、Nicholas Dennis、Gebran J. Sabongi、Soheila Rahimi-Rastgoo、Gerhard W. Fischer、Ian J. Fletcher
DOI:10.1039/p19800001176
日期:——
Dichloroketen and a series of aryl(bromo)ketens react with various 1-substituted 3-oxidopyridiniums to give novel bicyclic compounds by addition across the C(4)–O and the C(2)–O positions. Frontier-MO theory is used to rationalise the orientation of these cycloadditions. Acid-catalysed hydrolysis of the C(2)–O adducts (9) yielded 3-hydroxy-2-benzylpyridines.