Results 151 to 160 of about 17,602 (278)

Strategies Toward Accessing Enantioenriched (Hetero)Benzo‐Fused 5‐ and 6‐ Membered Rings via Intermolecular Carbometalation

Angewandte Chemie, Volume 138, Issue 23, 1 June 2026.
The use of transition‐metal catalysts and design of chiral ligands have allowed chemists to access highly functionalized benzofused 5‐ and 6‐ membered rings in high yield and enantioselectivity. A common strategy used relies on an intermolecular carbometalation across alkynes and olefins, usually followed by a subsequent intramolecular carbometalation.
Clara Jans, Armaan Grewal, Xavier Abel‐Snape, Mark Lautens   +3 more
wiley   +2 more sources

Rh(iii)-catalyzed oxidative C-H annulation of 6-arylpyridazin-3(2<i>H</i>)-ones: direct access to diarylpyridazino[6,1-<i>a</i>]isoquinolin-5-ium-3-olates. [PDF]

RSC Adv
Ittamalla C, Mukundram NSS, Nagireddy J, Sridhar B, Reddy BVS.   +4 more
europepmc   +1 more source

Switchable annulation paths to diverse N-bridged bicyclic scaffolds via ligand-directed dicarbonylation. [PDF]

Nat Commun
Liu YK, Yang P, Wang LC, Bao ZP, Wu XF.
europepmc   +1 more source

Transition-Metal-Catalyzed C-H/N-H Annulation Reactions between Imidazoles and Alkynes for the Synthesis of Fluorescent Benzimidazo[2,1‑<i>a</i>]Isoquinolines. [PDF]

ACS Omega
Dias GG.
europepmc   +1 more source

Substrate‐Controlled Organocatalytic Divergent Annulations of γ, γ’‐Alkylidene Indane‐1,3‐Diones With Enals

Advanced Synthesis &Catalysis, Volume 368, Issue 11, 3 June 2026.
A substrate‐dependent, regio‐ and stereocontrolled diversity‐oriented organocatalytic vinylogous Michael addition/cyclization cascade of γ, γ’‐alkylidene indane‐1,3‐diones with enals, using secondary amines as the catalyst, has been developed. A substrate‐dependent, regio‐ and stereo‐controlled diversity‐oriented organocatalytic vinylogous Michael ...
Jen‐Yu Kuan, Bo‐Wei Huang, Jeng‐Liang Han   +2 more
wiley   +1 more source

Gallium/Indium-Promoted [4 + 2] Annulation of 2‑Aminobenzonitriles with Alkynes and Dimerization of 2‑Aminobenzonitriles: One-Pot Access to 4‑Aminoquinolines and 4‑Amino-2-Arylquinazolines. [PDF]

ACS Omega
Sakai N, Ishii M, Yamauchi S, Ogiwara Y, Ishida K.   +4 more
europepmc   +1 more source

Electrochemical Hofmann Rearrangement for Modular Synthesis of Unsymmetrical Ureas and Late‐Stage Modification of Drugs

Advanced Science, Volume 13, Issue 31, 4 June 2026.
An electrochemical Hofmann rearrangement of amide involving amine or other amide nucleophiles has been developed. The use of NaI guarantees the feasibility and compatibility of the electrosynthesis protocol, which enables highly chemoselective synthesis of unsymmetrical N‐acylureas from two different amides, as well as the production of unsymmetrical ...
Xue‐Qing Mou, Xiao Zha, Yu‐Rui Jian, Shao‐Xing Zhong, Xin‐Yu Fu, Sheng‐Yang Xu, Wei Xiang, Bao‐Dong Cui, Yun Zhang, Yong‐Zheng Chen   +9 more
wiley   +1 more source

Pyridoxal 5'-Phosphate-Dependent Enzymatic Decarboxylative Annulation. [PDF]

J Am Chem Soc
Chai W, Luo S, Xi W, He X, Zhang T, Zou Y, Hai Y.   +6 more
europepmc   +1 more source

Total Synthesis of the Spirocyclic Bis-Indole Alkaloid (-)-Owerreine via a [4+2] Annulation. [PDF]

Angew Chem Int Ed Engl
Coll E, Gandon V, Kouklovsky C, Evanno L, Vincent G.   +4 more
europepmc   +1 more source

First Occurrence of <i>Wronascolex</i> sp. (Palaeoscolecida, Priapulida) in the Cambrian Tianpeng Formation (Wuliuan Stage), Southeastern Yunnan, South China: Implications for a New Burgess Shale-Type Lagerstätte. [PDF]

Life (Basel)
Xiao SY, Chen LR, Zhang ST, Zhang D, Chen XC, Hu YK, Song QY, Yang XQ, Zuo RH, Zhang GX.   +9 more
europepmc   +1 more source