Radical cyclization of alkynyl aryl ketones for the synthesis of 3-seleno-substituted thiochromones and chromones

RH Bartz, KB Silva, TJ Peglow, AM Barcellos… - Organic & …, 2022 - pubs.rsc.org
… We report a strategy for the direct synthesis of 3-organylselanylthiochromones and 3-organylselanylchromones
via the radical cyclization reaction between alkynyl aryl ketones

Cascade radical cyclizations via biradicals generated from enediynes, enyne-Allenes, and enyne-ketenes

KK Wang - Chemical reviews, 1996 - ACS Publications
… The use of aromatic enediynes for tandem-radical cyclization is also possible and appears …
yield of the tricyclic ketone 53 (Scheme 9). Ketone 53 arises from a radical cyclization of 50 to …

Recent advances in cascade radical cyclization of radical acceptors for the synthesis of carbo-and heterocycles

J Liao, X Yang, L Ouyang, Y Lai, J Huang… - Organic Chemistry …, 2021 - pubs.rsc.org
… In a pioneering study published in 2019, Yang and co-workers developed a visible-light-induced
cascade radical cyclization of 2-aryl phenyl isocyanides to construct varieties of 6-…

Photochemical radical cyclization of γ, δ-unsaturated ketone oximes to 3, 4-dihydro-2H-pyrroles

M Kitamura, Y Mori, K Narasaka - Tetrahedron letters, 2005 - Elsevier
… During the course of our study on radical cyclization with oximes, 3 it was found that γ,δ-unsaturated
ketone O-(… Next, the cyclization of aryl ketone oximes was examined instead of alkyl …

Manganese (III)-based oxidative free-radical cyclizations

BB Snider - Chemical reviews, 1996 - ACS Publications
cyclizations of unsaturated ketones can be carried out in high yield in acetic acid at 80 C if the
ketonearyl alkyl ketones. The utility of these manganese(III) carboxylates in oxidative free-…

Controlling the regiochemistry of radical cyclizations

H Ishibashi - The Chemical Record, 2006 - Wiley Online Library
… The 6-endo- and 7-endo-selective aryl radical cyclizations were applied to radical cascades
… 54 from 55 is attractive for the synthesis of mappicine ketone (Nothapodytine B) (67) (Fig. 17)…

Enantioselective cyclizations and cyclization cascades of samarium ketyl radicals

N Kern, MP Plesniak, JJW McDouall, DJ Procter - Nature chemistry, 2017 - nature.com
… Here, we demonstrate that enantioselective SmI 2 -mediated radical cyclizations and … C–C
coupling of samarium ketyls, derived from aryl ketones, with acrylates using SmI 2 and the …

Mn (III)-based oxidative free radical cyclization of unsaturated ketones.

BB Snider, BMC Cole - The Journal of Organic Chemistry, 1995 - ACS Publications
… free-radical cyclizations of unsaturated ketones have not been … radical formation and further
oxidation of the product ketones … procedure cyclize onto aromatic rings. Oxidation of the -keto …

Recent Progress in the Radical α-C (sp 3)–H Functionalization of Ketones

JZ Li, WK Zhang, GP Ge, H Zheng… - Organic & Biomolecular …, 2021 - pubs.rsc.org
… Intermediate D was then generated by intramolecular radical cyclization of C. Finally, the …
work opened a brand-new route for the formation of aromatic tertiary amines using ketones. …

The Cp2TiPh-Mediated Reductive Radical Cyclization of Cyanoketones and Related Reactions. Efficient Trapping of Ketyl Radicals by Cp2TiPh-Coordinated Polar …

Y Yamamoto, D Matsumi, R Hattori… - The Journal of Organic …, 1999 - ACS Publications
… also demonstrated by the aromatic ketoester cyclization depicted in Scheme 9. … ketone 16c
gave no cyclized product. Therefore, the ketoester cyclization was limited to aromatic ketones