Dimethyl Sulfoxide and N-Iodosuccinimide Promoted 5-exo-dig Oxidative Cyclization of Yne-Tethered Ynamide: Access to Pyrrolidones and Spiro-pyrrolidones

B Prabagar, S Nayak, R Prasad, AK Sahoo - Organic letters, 2016 - ACS Publications
An unprecedented metal-free dimethyl sulfoxide (DMSO) and N-iodosuccinimide mediated
regioselective 5-exo-dig oxidative cyclization of an in situ generated enol equivalent of …

A 6-endo-dig Thiolative Cyclization of Yne-Ynamides: Access to Thiodihydropyridin-2-ones

S Kanikarapu, MP Gogoi, S Dutta, AK Sahoo - Organic Letters, 2022 - ACS Publications
A straightforward regioselective intramolecular 6-endo-dig cyclization of yne-tethered
ynamide is herein developed. The reaction involves an intramolecular enolate attack of …

Radical Cyclization of Ynamides to Nitrogen Heterocycles

C Zhang, N Blanchard, G Evano - Synthesis, 2023 - thieme-connect.com
An efficient radical cyclization of suitably functionalized ynamides to nitrogen-containing
heterocycles is reported. Upon reaction with tributyltin hydride in the presence of catalytic …

Copper (I)-Catalyzed Indolyl Ynamide Oxidation/Dearomatization: Divergent and Regioselective Synthesis of Valuable Indoline Scaffolds

GX Ru, Q Liu, KF Wei, XH Zhu, XL Jiang, LX Xie… - Organic …, 2024 - ACS Publications
A highly convenient copper (I)-catalyzed oxidation-initiated cyclopropanation of indolyl
ynamide for the rapid construction of indole-fused cyclopropane-lactams is described, which …

Synthesis of polycyclic aminal heterocycles via decarboxylative cyclisation of dipeptide derivatives

EGL Robert, E Le Du, J Waser - Chemical Communications, 2022 - pubs.rsc.org
An oxidative-decarboxylative intramolecular cyclisation of dipeptide derivatives is reported.
This transformation is promoted by phenyl iodine (III) diacetate (PIDA) in combination with …

Ynamides enabled 6-, 7-, and 8-endo-dig iodocyclization of ethoxyethyl ethers: rapid construction of medium-sized oxacycles at room temperature

T Okitsu, A Namura, S Kondo, S Tada… - Organic Chemistry …, 2020 - pubs.rsc.org
Iodocyclization of ethoxyethyl ethers to ynamides was developed to form six, seven-, and
eight-membered cyclic ethers. These reactions reached completion within short reaction …

Radical Deaminative ipso-Cyclization of 4-Methoxyanilines with 1,7-Enynes for Accessing Spirocyclohexadienone-Containing Cyclopenta[c]quinolin-4-ones

J Li, WW Zhang, XJ Wei, F Liu, WJ Hao… - The Journal of …, 2017 - ACS Publications
A new C-center radical-triggered bicyclization cascade of N-tethered 1, 7-enynes for forming
28 examples of biologically interesting spirocyclohexadienone-containing cyclopenta [c] …

Transition‐Metal‐Free Reverse Reactivity of (2‐Alkynyl)‐Arylaldimines: Assembly of Functionalized Amino‐Indinones

KM Saini, RK Saunthwal, Sushmita… - … –A European Journal, 2020 - Wiley Online Library
Transition‐metal‐free regioselective synthesis of functionalized amino‐indenones by the
reaction of ortho‐alkynylaldehydes with a broad range of primary amines by intramolecular …

Synthesis of polysubstituted azetidines via cascade trifluoromethylation/cyclization of N-allyl ynamides

G Zhou, J Su, T Shang, X Wang, Y Bai… - Organic Chemistry …, 2021 - pubs.rsc.org
Traditional methods for the transformation of N-allyl ynamides rely on the formation of a
ketenimine intermediate or its equivalent, while novel reaction modes remain to be …

Radical cyclization cascade involving ynamides: an original access to nitrogen-containing heterocycles

F Marion, C Courillon, M Malacria - Organic Letters, 2003 - ACS Publications
Radical Cyclization Cascade Involving Ynamides: An Original Access to Nitrogen-Containing
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