Results 91 to 100 of about 81,584 (205)

Phosphine-Catalyzed (3 + 2)/(3 + 2) Sequential Annulation of γ‑Vinyl Allenoates: Access to Fused Carbocycles

, 2019
The first (3 + 2)/(3 + 2) sequential annulation of γ-vinyl allenoates with alkylidenemalononitriles enabled by phosphine catalysis has been reported. A broad range of structurally dense tetra- and penta-substituted bicyclic­[3,3,0]­octene derivatives ...
You Huang, Yingying Chen (500738), Wenhui Qin (8179452), Jiaxu Feng (6376580), You Huang (44838), Jiaxu Feng, Yingying Chen, Wenhui Qin   +7 more
core   +1 more source

Transition from Kwon [4+2]- to [3+2]-cycloaddition enabled by AgF-assisted phosphine catalysis

Nature Communications
Phosphine catalysis generally relies on the potential of carbanion-phosphonium zwitterions that are generated via nucleophilic addition of phosphine catalyst to electrophilic reactants.
Jinlong Qian, Lijin Zhou, Yuyi Wang, Xiaoyu Zhou, Xiaofeng Tong   +4 more
doaj   +1 more source

Phosphine-Catalyzed [4 + 3] Annulation of β′-Acetoxy Allenoates with 1C,3N-Dinucleophiles: Access to Functionalized Azepine Derivatives

A novel method for the synthesis of functionalized azepine derivatives has been developed through a phosphine-catalyzed [4 + 3] annulation of β′-acetoxy allenoates with benzimidazole-derived 1C,3N-dinucleophiles.
Zhanhang Liang (18245185), Fan Yu (513775), Dong Zhang (73558), Chen Chen (6544), Chunjie Ni (1598071), Xiaojuan Xu (765611)   +5 more
core   +1 more source

Polymorphism in a secondary phosphine

Acta Crystallographica Section C Structural Chemistry
Two crystal structures of bis(2,3,5,6-tetramethylphenyl)phosphine, C 20 H 27 P, are reported constituting the first recorded case of polymorphism in a secondary phosphine ( R 2 PH).
Mo Liu, Keith Izod, Paul G. Waddell
openaire   +3 more sources

Phosphine-Catalyzed α‑Umpolung–Aldol Reaction for the Synthesis of Benzo[b]azapin-3-ones

, 2019
A novel phosphine-catalyzed intermolecular cyclization between 2-sulfonamidobenzaldehyes and ynones is reported. This methodology serves as a conduit for the construction of benzo­[b]­azepin-3-ones in good to excellent yields under mild conditions.
Ohyun Kwon (200984), Sooji Hong (4735668), Lingchao Cai (1661113), Ohyun Kwon, Sooji Hong, Lingchao Cai, Kui Zhang (46471), Kui Zhang   +7 more
core   +1 more source

Phosphine-Catalyzed [2 + 4] Annulation of Allenoates with Thiazolone-Derived Alkenes: Synthesis of Functionalized 6,7-Dihydro‑5H‑pyrano­[2,3‑d]thiazoles

, 2016
Phosphine-catalyzed [2 + 4] annulation of allenoates with thiazolone-derived alkenes has been achieved under mild conditions, giving biologically important 6,7-dihydro-5H-pyrano­[2,3-d]­thiazole derivatives in high to excellent yields.
Zhanhu Sun (2544583), Leijie Zhou (1695967), Chunhao Yuan (1538038), Chang Wang (328274), Zhenzhen Gao (517508), Hongchao Guo (1538041), Yumei Xiao (1538035)   +6 more
core   +1 more source

Solvent-Controlled Chemoselectivity in Brønsted Acidic Deep Eutectic Mixtures: A Metal-Free One-Pot Cascade Meyer-Schuster/C-P Bond Formation. [PDF]

ChemSusChem
Morís-Menéndez G, Ríos-Lombardía N, Ramos-Martín M, Presa Soto A, García-Álvarez J.   +4 more
europepmc   +1 more source

Direct arylation polymerization of electron-rich arenes with polar-group tolerance enabled by ligand-coordination tuning. [PDF]

Chem Sci
Pei X, Wu W, Sun Y, Yang Q, Weng J, Zhang S, Geng Z, Zhu B.   +7 more
europepmc   +1 more source

Non-equilibrium preparation of (<i>E</i>)-phosphinimine (HPNH, X¹A') - a precursor to prebiotic phosphorylating agents. [PDF]

Chem Sci
Wang J, Sun BJ, Bergantini A, Wang Z, McAnally M, Marks JH, Chang AHH, Eckhardt AK, Kaiser RI.   +8 more
europepmc   +1 more source

Defect engineering within clusters to enhance cluster-support interaction boosts catalytic performance. [PDF]

Chem Sci
Chen J, Wang Y, Zhang Y, Yan H, Li Q, Chai J, Gao G, Liu C, Yang S, Zhu M.   +9 more
europepmc   +1 more source