RhII‐Catalyzed Cyclization of Ester/Thioester‐Containing N‐Sulfonyl‐1,2,3‐triazoles: Facile Synthesis of Alkylidenephthalans and Alkylidenethiophthalans
Sign Up to like & getrecommendations! Published in 2017 at "Asian Journal of Organic Chemistry"
DOI: 10.1002/ajoc.201600466
Abstract: A facile synthetic method to access alkylidenephthalan or alkylidenethiophthalan derivatives has been developed via a cyclization reaction from N-sulfonyl-1,2,3-triazole derivatives by Rhodium(II)-Catalyzed rearrangement. read more here.
Keywords: rhii catalyzed; catalyzed cyclization; cyclization; thioester containing ... See more keywords
H4SiW12O40-catalyzed cyclization of epoxides/aldehydes and sulfonyl hydrazides: An efficient synthesis of 3,4-disubstituted 1H-pyrazoles
Sign Up to like & getrecommendations! Published in 2021 at "Chinese Chemical Letters"
DOI: 10.1016/j.cclet.2021.08.037
Abstract: Abstract A simple and efficient method for the synthesis of pyrazoles through a silicotungstic acid (H4SiW12O40)-catalyzed cyclization of epoxides/aldehydes and sulfonyl hydrazides has been developed. Various epoxides/aldehydes were smoothly reacted with sulfonyl hydrazides to furnish… read more here.
Keywords: catalyzed cyclization; disubstituted pyrazoles; cyclization epoxides; sulfonyl hydrazides ... See more keywords
Reactions of alkynes- copper-catalyzed cyclization of functionalized alkynes with elemental sulfur/selenium to form oxathiines/oxaselenines
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Organometallic Chemistry"
DOI: 10.1016/j.jorganchem.2019.03.007
Abstract: Abstract In this article, a part of the work related to the reactivity of alkynes from our group will be highlighted. These include (i) [Pd]-catalyzed double arylation and phosphonylation of phosphonoalkynes, (ii) Ruthenium catalyzed insertion… read more here.
Keywords: elemental sulfur; catalyzed cyclization; sulfur selenium; cyclization ... See more keywords
Highly stereoselective synthesis of (Z)-3-methoxy-1-methyleneisoindoles via DMAP catalyzed cyclization of methyl 2-alkynylbenzimidates
Sign Up to like & getrecommendations! Published in 2019 at "Tetrahedron"
DOI: 10.1016/j.tet.2019.04.036
Abstract: Abstract A DMAP (4-dimethylaminopyridine) catalyzed cyclization of methyl 2-alkynylbenzimidates has been developed, which affords 3-methoxy-1-methyleneisoindoles with excellent Z-stereoselectivity under mild and transition-metal-free conditions. The (Z)-3-methoxy-1-methyleneisoindole products can be converted to corresponding 3-amino-1-methyleneisoindoles, 3-methoxy-isoindoles, 3-methyleneisoindolinones and… read more here.
Keywords: catalyzed cyclization; methoxy methyleneisoindoles; dmap; methyl alkynylbenzimidates ... See more keywords
Copper-Catalyzed Cyclization of N-Propargyl Ynamides with Borane Adducts through B-H Bond Insertion.
Sign Up to like & getrecommendations! Published in 2021 at "Organic letters"
DOI: 10.1021/acs.orglett.1c03092
Abstract: An efficient copper-catalyzed cyclization of N-propargyl ynamides with borane adducts through B-H bond insertion has been developed. A series of valuable organoboron compounds are constructed in generally good yields with a wide substrate scope and… read more here.
Keywords: catalyzed cyclization; bond; cyclization propargyl; bond insertion ... See more keywords
Cu-Catalyzed Cyclization/Coupling of Alkenyl Aldimines with Arylzinc Reagents: Access to Indole-3-diarylmethanes.
Sign Up to like & getrecommendations! Published in 2022 at "Organic letters"
DOI: 10.1021/acs.orglett.2c02531
Abstract: We report a Cu(II)-catalyzed cyclization/coupling of alkenyl aldimines with arylzinc reagents to create indole-3-diarylmethane derivatives (Sapkota et al. ChemRxiv 2022, DOI: 10.26434/chemrxiv-2022-d6qn). The current reaction provides a unified modular route from readily available starting materials… read more here.
Keywords: catalyzed cyclization; aldimines arylzinc; cyclization coupling; alkenyl aldimines ... See more keywords
Gold-Catalyzed Cyclization/Hydroboration of 1,6-Enynes: Synthesis of Bicyclo[3.1.0]hexane Boranes.
Sign Up to like & getrecommendations! Published in 2022 at "Organic letters"
DOI: 10.1021/acs.orglett.2c03812
Abstract: The gold-catalyzed cyclization/hydroboration of 1,6-enynes offers facile, versatile, and atom-economical one-step access to bicyclo[3.1.0]hexane boranes. This new protocol proceeds in moderate to good yields under mild conditions. Different from bicyclo[3.1.0]hexane borates, these products are stable… read more here.
Keywords: cyclization hydroboration; catalyzed cyclization; bicyclo hexane; gold catalyzed ... See more keywords
Copper-Catalyzed Cyclization of 2-Alkynylanilines to Give 2-Haloalkoxy-3-alkyl(aryl)quinolines.
Sign Up to like & getrecommendations! Published in 2023 at "Organic letters"
DOI: 10.1021/acs.orglett.2c04314
Abstract: Herein we describe a method to produce 2-haloalkoxy-3-substituted quinolines via the cyclization of 2-alkynylanilines with TMSCF3 and THF. This synthetic method uses inexpensive and easy-to-handle TMSCF3 and employs a commercially available CuI catalyst to transform… read more here.
Keywords: catalyzed cyclization; alkynylanilines give; cyclization; cyclization alkynylanilines ... See more keywords
DMSO-mediated palladium-catalyzed cyclization of two isothiocyanates via C–H sulfurization: a new route to 2-aminobenzothiazoles
Sign Up to like & getrecommendations! Published in 2019 at "RSC Advances"
DOI: 10.1039/c8ra09784d
Abstract: DMSO-initiated coupling of two isothiocyanates; Pd-catalyzed C–H sulfurization. read more here.
Keywords: mediated palladium; catalyzed cyclization; dmso mediated; palladium catalyzed ... See more keywords
Enantioselective gold(i)-catalyzed cyclization/intermolecular nucleophilic additions of 1,5-enyne derivatives.
Sign Up to like & getrecommendations! Published in 2020 at "Chemical communications"
DOI: 10.1039/d0cc00914h
Abstract: An enantioselective Au(i)-catalyzed cyclization/nucleophilic addition process is developed, starting from 1,5-enyne substrates. A broad scope of O-, N- and C-nucleophiles was introduced in order to provide the corresponding chiral cyclopentene derivatives in moderate to high… read more here.
Keywords: cyclization intermolecular; catalyzed cyclization; cyclization; enantioselective gold ... See more keywords
Access to 5-fluoroalkylated trisubstituted oxazoles via copper-catalyzed cyclization of α-fluoroalkyl-α-diazoketones with amides.
Sign Up to like & getrecommendations! Published in 2022 at "Chemical communications"
DOI: 10.1039/d2cc01057g
Abstract: A novel copper-catalyzed cyclization of α-fluoroalkyl-α-diazoketones with (thio)amides has been developed. This mechanistically distinct protocol provides a robust and straightforward approach to construct 5-fluoroalkylated trisubstituted oxazoles and thiazoles with high efficiency and excellent functional group… read more here.
Keywords: catalyzed cyclization; copper; fluoroalkylated trisubstituted; fluoroalkyl diazoketones ... See more keywords