Directing group-assisted selective C–H activation of six-membered N-heterocycles and benzo-fused N-heterocycles

SR Mohanty, N Prusty, T Nanda, PS Mahulkar… - Organic Chemistry …, 2024 - pubs.rsc.org
Heterocycles are found to be present as the fundamental core compositions of many natural
products, agrochemicals, and pharmaceuticals. Among all, the nitrogen-containing …

Pd-catalyzed regioselective rollover dual C–H annulation cascade: facile approach to phenanthrene derivatives

MN Kumar, V Suresh, A Nagireddy… - Chemical …, 2023 - pubs.rsc.org
Annulations of unsaturated systems through C–H activation represent a powerful tool for
producing multicyclic scaffolds. Having coordinating centers in both annulation partners (a …

Transition Metal‐Catalyzed Dual C− H Activation/Annulation Reactions Involving Internal Alkynes

F Doraghi, MS Karimtabar, M Ghasemi… - The Chemical …, 2024 - Wiley Online Library
Recently, transition metal‐catalyzed ortho‐C− H bond activation/annulations involving two
internal alkyne molecules have been extensively used to synthesize highly substituted …

Rhodium‐Catalyzed Dual C− H Activation for Regioselective Triple Annulation of Enaminones: Access to Polycyclic Naphthopyran Derivatives

V Suresh, M Naveen Kumar… - Advanced Synthesis …, 2023 - Wiley Online Library
Rh‐catalyzed C− H activation of arenes for oxidative annulations with alkynes stands out as
a protocol for polycyclic scaffolds. This perspective drives us to disclose herein a rhodium …

Rh (III)-Catalyzed Weakly Coordinating 2-Pyridone-Directed Oxidative Annulation Using Internal Alkynes: A Reversal in Selectivity

S Bera, S Sarkar, J Pal, R Samanta - Organic Letters, 2022 - ACS Publications
A rhodium (III)-catalyzed Satoh–Miura type oxidative annulation of N-aryl 2-pyridone
derivatives is described using internal alkyne as a coupling partner. A weakly coordinating …

Pd (II)-Catalyzed Oxidative Naphthylation of 2-Pyridone through N–H/C–H Activation Using Diarylacetylene as an Uncommon Arylating Agent

S Bera, A Biswas, J Pal, L Roy, S Mondal… - Organic …, 2023 - ACS Publications
A Pd (II)-catalyzed straightforward oxidative naphthylation of unmasked 2-pyridone
derivatives is described using a twofold internal alkyne as a coupling partner. The reaction …

Co (iii)-catalyzed regioselective benzannulation of substituted pyridones with 1, 6-diynes via dual C–H bond activation

SK Yadav, M Jeganmohan - Chemical Communications, 2024 - pubs.rsc.org
A Co (III)-catalyzed site-selective C5 and C6 benzannulation of substituted pyridones with 1,
6-diynes via dual C–H bond activation has been reported. The scope of the benzannulation …

Ir (III)-Catalyzed Tandem Annulation of Aromatic Amides with 1, 6-Diynes via Dual C–H Bond Activation

SK Yadav, M Jeganmohan - Organic Letters, 2024 - ACS Publications
An Ir (III)-catalyzed annulation of aryl amides with 1, 6-diynes via ortho-as well as meta-dual
C–H bond activation reaction is reported. The scope of the annulation reaction was …

Synthesis of Naphtho[1′,2′:4,5]furo[3,2-b]pyridinones via Ir(III)-Catalyzed C6/C5 Dual C–H Functionalization of N-Pyridyl-2-pyridones with Diazonaphthalen-2(1H …

Y Xu, Y Xiao, X Zhang, X Fan - Organic Letters, 2024 - ACS Publications
Presented herein is an unprecedented synthesis of naphtho [1′, 2′: 4, 5] furo [3, 2-b]
pyridinones via Ir (III)-catalyzed C6/C5 dual C–H functionalization of N-pyridyl-2-pyridones …

The “cesium effect” magnified: exceptional chemoselectivity in cesium ion mediated nucleophilic reactions

S Biswas, WB Hughes, L De Angelis, GC Haug… - Chemical …, 2024 - pubs.rsc.org
Chemodivergent construction of structurally distinct heterocycles from the same precursors
by adjusting specific reaction parameters is an emergent area of organic synthesis; yet …