Results 1 to 10 of about 88,292,358 (173)

A de-novo Approach Towards Divergent [3+2π/σ] Photocycloadditions of Nitrones via Assembly-Controlled Kinetic Electron Transfer Gating. [PDF]

Angew Chem Int Ed Engl
A metal‐free photocatalytic platform converts nitrones into 4‐isoxazolines and oxa–aza–bicycloheptanes through divergent [3+2π/σ] cycloadditions. Assembly‐controlled kinetic electron transfer gating dictates substrate activation, enabling selective reactivity beyond thermodynamic expectations.
Saha N, Kancherla R, Escorihuela J, Chandran S, Bera MK, Rueping M, König B.   +6 more
europepmc   +3 more sources

Lewis Acid-Catalyzed Strain-Enabled (3+3) Annulation of Bicyclo[1.1.0]Butanes With Indolylalcohols: Synthesis of Indole-Fused Aza-Bicyclo[3.1.1]Heptanes. [PDF]

Adv Sci (Weinh)
Bicyclo[1.1.0]butanes undergo a Lewis acid‐catalyzed formal (3 + 3) annulation with indolyl alcohols to furnish indole‐fused aza‐bicyclo[3.1.1]heptanes. Strain‐release‐driven C‐C bond formation, followed by C‐N bond formation via ring expansion, enables the rapid assembly of rigid, sp3‐rich bicyclic architectures under mild reaction conditions ...
Dey M, Mahapatra TSD, Sharma P, Mane MV, Hazra CK.   +4 more
europepmc   +2 more sources

Conjugated Nitroolefins as Twofold Electrophiles for the Assembly of Five-Membered Monoheterocycles via MIRC [3+2] Annulation: An Update on Synthetic and Mechanistic Aspects. [PDF]

Molecules
Bianchi L, Maccagno M, Petrillo G, Tavani C.   +3 more
europepmc   +1 more source

A Remarkable Selectivity Observed in Hetero-Diels-Alder Reactions of Levoglucosenone (LGO) with Thiochalcones: An Experimental and Computational Study. [PDF]

Molecules
Mlostoń G, Urbaniak K, Palusiak M, Würthwein EU, Reissig HU, Witczak ZJ.   +5 more
europepmc   +1 more source

Tunable Endo/Exo Selectivity in Direct Catalytic Asymmetric 1,3-Dipolar Cycloadditions with Polyfunctional Lewis Acid / Azolium-Aryloxide Catalysts. [PDF]

Angew Chem Int Ed Engl
Bürstner A, Becker PM, Allgaier A, Pfitzer L, Wanner DM, Dollinger J, Willig F, Herrmann J, Miskov-Pajic V, Hans AC, Frey W, van Slageren J, Kästner J, Peters R.   +13 more
europepmc   +1 more source

α‑Fluoronitroalkenes as Fluorinated Building Blocks: Solvent-Controlled Functionalization with Hydrazones. [PDF]

ACS Org Inorg Au
Saucier MA, Alrefaei H, McCluggage PA, Abd El-Gaber MK, Huang TY, Jana S, Roy S.   +6 more
europepmc   +1 more source

Creating a Masterpiece. The Road to (and Beyond) Woodward and Hoffmann's 1969 Angewandte Chemie Treatise. [PDF]

Chem Rec
Seeman JI.
europepmc   +1 more source

Copper- and Silver-Catalyzed Reactions of Active Methylene Isocyanides: Facile Access to Highly Substituted Five- and Six-Membered Heterocycles. [PDF]

Chemistry
George J, Oh K.
europepmc   +1 more source

Ambident reactivity of enolizable 5-mercapto-1<i>H</i>-tetrazoles in trapping reactions with in situ-generated thiocarbonyl <i>S</i>-methanides derived from sterically crowded cycloaliphatic thioketones. [PDF]

Beilstein J Org Chem
Mlostoń G, Celeda M, Palusiak M, Heimgartner H, Denel-Bobrowska M, Olejniczak AB.   +5 more
europepmc   +1 more source

Mechanochemical Diastereoselective Substrate-Directed Synthesis of Pyrrole-Isoxazolidines via 1,3-Dipolar Cycloaddition of Maleimides with Nitrones. [PDF]

J Org Chem
de Jesus IS, Lédo AFDC, Ferrer A, A Bueno M, Cunha S.   +4 more
europepmc   +1 more source