One-Pot Synthesis of Polysubstituted Spirofluorene–Indene via Ru(II)-Catalyzed [3 + 2] Annulation and Intramolecular Friedel–Crafts Cyclization

Ru­(II)-catalyzed one-pot synthesis of polysubstituted spirofluorene–indenes via [3 + 2] annulation and then intramolecular Friedel–Crafts alkylation has been achieved. The simple method provides a broad scope of aryl ketones and internal alkynes, achieving PAHs skeletons in moderate to good yields

Formation of Fluorovinyl Spiro-[imidazole-indene] and α‑Amino-β-naphthalenones via Rh(III)-Catalyzed Cascade C–H Functionalization

An efficacious method for building fluorovinyl spiro-[imidazole-indene] and α-amino-β-naphthalenone skeletons synchronously has been shown to consist of Rh(III)-catalyzed C–H functionalization between 2H-imidazoles and difluoromethylene alkynes. This protocol demonstrates a practical and straightforward route for installing fluorine elements in the envisioned position of heterocyclic compounds

sj-docx-1-oss-10.1177_01708406231162000 – Supplemental material for Amplifying Stigmatization: Owlcatraz and the naming of a football stadium

Supplemental material, sj-docx-1-oss-10.1177_01708406231162000 for Amplifying Stigmatization: Owlcatraz and the naming of a football stadium by Lin Dong, Bryant Ashley Hudson, David Moura and Lee C. Jarvis in Organization Studies</p

Cobalt(III)-Catalyzed C–H Amidation of 7‑Azaindoles with Dioxazolones: Synthesis of 7‑Azaindole Amidated Derivatives

An efficient cobalt-catalyzed C–H amidation of 7-azaindoles was developed by using dioxazolones as the amidating reagent. A wide scope of substituted 7-azaindoles, even <i>N</i>-vinly groups, is suitable for the reaction, generating 7-azaindoles derivatives with potential properties up to 91% yield under straightforward and strong applicable reaction conditions

Organocatalytic Sequential Hetero-Diels–Alder and Friedel–Crafts Reaction: Constructions of Fused Heterocycles with Scaffold Diversity

A highly enantioselective aza-Diels–Alder and Friedel–Crafts reaction sequence of <i>N</i>-sulfonyl-1-aza-1,3-butadienes and aliphatic aldehydes tethered to an arene motif has been developed, affording the fused chiral piperidine frameworks with a versatile scaffold diversity. A similar strategy has been applied for the construction of complex chiral tetrahydroquinoxaline structures

Highly Functionalized Pyridines Synthesis from <i>N</i>‑Sulfonyl Ketimines and Alkynes Using the N–S Bond as an Internal Oxidant

The N–S bond-based internal oxidant offers a distinct approach for the synthesis of highly functionalized pyridines. A novel Rh­(III)-catalyzed one-pot process undergoes an efficient C–C/C–N bond formation along with desulfonylation under very mild conditions. The method is quite simple, general, and efficient

Rhodium(III)-Catalyzed Oxidative Annulation of 7‑Azaindoles and Alkynes via Double C–H Activation

Rhodium­(III)-catalyzed double C–H activation involving <i>N</i>-directed <i>ortho</i> C–H activation and subsequent <i>roll-over</i> C–H activation of the heterocycle ring has been developed to form complex 7-azaindole derivatives in moderate to excellent yields. A broad scope of 7-azaindoles and internal alkynes has been demonstrated in this oxidative annulation reaction

Mechanically Induced Light Emission and Infrared-Laser-Induced Upconversion in the Er-Doped CaZnOS Multifunctional Piezoelectric Semiconductor for Optical Pressure and Temperature Sensing

In this study, we report an Er-doped quaternary piezoelectric semiconductor CaZnOS:Er³⁺ which shows both mechanoluminescence and upconversion luminescence properties. Under mechanical stimulation, green light emission can be observed by the naked eye from a flexible film fabricated by encapsulating CaZnOS:Er³⁺ particles between two polyethylene glycol terephthalate substrates. The integral emission intensity is proportional to applied pressure, making CaZnOS:Er³⁺ suitable for dynamic pressure sensing applications. Moreover, the doped sample also shows bright visible emission with near-infrared (980 nm) excitation. The fluorescence intensity ratio between two upconversion emission bands corresponding to ²H_11/2, ⁴S_3/2 → ⁴I_15/2 transitions of Er³⁺ is sensitive to the variation of temperature. As a multifunctional optical material, CaZnOS:Er³⁺ could be used to not only visualize two-dimensional pressure distribution, through mechanically induced emission, but also sense temperature via the upconversion (UC) luminescence. This work provides a novel kind of multifunctional luminescent material for the development of integrated and coupling devices

Aminocatalytic Asymmetric <i>exo</i>-Diels–Alder Reaction with Methiodide Salts of Mannich Bases and 2,4-Dienals to Construct Chiral Spirocycles

An asymmetric <i>exo</i>-Diels–Alder reaction of α-methylene carbonyl compounds, generated in situ from stable methiodide salts of Mannich bases, with 2,4-dienals, has been developed through trienamine activation of a chiral secondary amine. A spectrum of spirocyclanes with high molecular complexity was efficiently constructed in moderate to excellent diastereo- and enantioselectivity