Rhodium‐Catalyzed C8‐Alkenylation of Isoquinolones with Maleimides
作者:Manisha、Devesh Chandra、Upendra Sharma
DOI:10.1002/ejoc.202300411
日期:2023.8.7
Selectiveolefination of N-protected isoquinolones at C8-position has been achieved under rhodiumcatalysis. A range of maleimides were employed to obtain the olefinated products in moderate to excellent yield with excellent selectivity. Kinetic Isotope Effect (KIE) study and Hammett plot analysis were also performed to understand the reaction mechanism.
Reactions of N-arylmaleimides with 3-amino-1,2,4-triazole and 2-aminobenzimidazole
作者:Roman V. Rudenko、Sergey A. Komykhov、Vladimir I. Musatov、Irina S. Konovalova、Oleg V. Shishkin、Sergey M. Desenko
DOI:10.1002/jhet.660
日期:2011.7
AbstractThe reaction of 3‐amino‐1,2,4‐triazole (1) with N‐arylmaleimides leads to azolopyrimidines 4 and 5. The 2‐aminobenzimidazole (2) in the reaction with 3 gives the pyrimidobenzimidazoles 6. In similar conditions, the reaction of amine 2 with maleic anhydride (7) leads to formation of 2‐oxo‐1,2,3,4‐tetrahydropyrimido[1,2‐a]benzimidazole‐4‐carboxylic acid (8). The structures of 4, 5, 6, and 8 were proved by X‐Ray and NOE NMR measurements. J. Heterocyclic Chem., (2011)
Chemo selective C-H alkylation of isoquinolones with maleimides: A combined experimental and computational case study
Pd‐Catalyzed Atropselective C−H Olefination Promoted by a Transient Directing Group
作者:Rohit Kumar、Devesh Chandra、Upendra Sharma
DOI:10.1002/adsc.202101242
日期:2022.2.15
A Pd(II)-catalyzed atropselective olefination of biaryls with maleimides is reported using chiral transient directing group (CTDG) strategy L-tert-leucine is used as a chiral auxiliary to obtain atropselective biaryl aldehydes with enantiomeric excess ranging from 70 to 99%. The method is also applicable for other olefins such as acrylonitrile, phenyl vinyl sulfone, and N-tert-butyl acrylamide, providing