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
Facile synthesis of indene and fluorene derivatives through AlCl3‐catalyzed cyclization of in situ formed iminium ions
Sign Up to like & getrecommendations! Published in 2017 at "Applied Organometallic Chemistry"
DOI: 10.1002/aoc.3863
Abstract: A simple AlCl3-catalyzed condensation/cyclization cascade process between aldehydes and sulfonamide is reported, in which two new bonds and one five-membered ring are simultaneously formed with water as the byproduct. This method provides a rapid access… read more here.
Keywords: indene fluorene; facile synthesis; cyclization; fluorene derivatives ... See more keywords
Dual Gold(I)‐catalyzed Cyclization of Dialkynyl Pyridinium Salts
Sign Up to like & getrecommendations! Published in 2017 at "ChemCatChem"
DOI: 10.1002/cctc.201700018
Abstract: Novel dialkynyl pyridines were synthesized and protected as alkyl salts for dual gold(I)‐catalyzed cycloisomerization. Different alkyl groups and counter ions were screened for the salts, with benzyl and hexafluorophosphate providing the best results. The cyclization… read more here.
Keywords: dual gold; cyclization; dialkynyl; gold catalyzed ... See more keywords
Catalytic Gas‐Phase Cyclization of Glycolate Esters: A Novel Route Toward Glycolide‐Based Bioplastics
Sign Up to like & getrecommendations! Published in 2018 at "ChemCatChem"
DOI: 10.1002/cctc.201801469
Abstract: A catalytic process to produce glycolide, the cyclic dimer of glycolic acid (GA), is proposed. Glycolide is the key building block of the biodegradable plastic polyglycolic acid. Instead of the current industrial two‐step route, which… read more here.
Keywords: glycolide; cyclization; glycolate; gas phase ... See more keywords
Nickel‐Catalyzed Sequential Dehydrogenation and Cyclization of 2‐Amino(Nitro)‐benzyl Alcohols with Alkyl Alcohols: Synthesis of C‐3‐Substituted Quinolines
Sign Up to like & getrecommendations! Published in 2023 at "ChemCatChem"
DOI: 10.1002/cctc.202300412
Abstract: We herein reported a general and efficient Ni‐catalyzed protocol for sequential double de‐hydrogenative cyclization of 2‐amino(nitro)‐benzyl alcohols with primary alcohols to C‐3‐substituted quinolines releasing water and dihydrogen as by products. As a special highlight, late… read more here.
Keywords: amino nitro; benzyl alcohols; nitro benzyl; cyclization amino ... See more keywords
Synthesis of Functionalized Quinolines from 4-(o-Nitroaryl)-Substituted 3-Acyl-4,5-Dihydrofurans: Reductive Cyclization and C=C Bond Cleavage
Sign Up to like & getrecommendations! Published in 2017 at "European Journal of Organic Chemistry"
DOI: 10.1002/ejoc.201700256
Abstract: A new synthetic approach to functionalized quinolines was developed based on the application of Zn–AcOH system as a simple and efficient reductive agent towards 4-(o-nitroaryl)-3-acyl-substituted 4,5-dihydrofurans. Reduction of 3-carbonyl-substituted dihydrofurans is accomplished by C=C double-bond… read more here.
Keywords: synthesis functionalized; functionalized quinolines; cyclization; bond cleavage ... See more keywords
Brønsted Acid Promoted Cyclization of Cross‐Conjugated Enynones into Dihydropyran‐4‐ones
Sign Up to like & getrecommendations! Published in 2017 at "European Journal of Organic Chemistry"
DOI: 10.1002/ejoc.201700423
Abstract: In triflic acid or sulfuric acid, diaryl-substituted cross-conjugated enynones undergo addition of the acid to the carbon–carbon triple bond to afford the corresponding vinyl triflates or sulfates. The vinyl triflates are stable under aqueous workup,… read more here.
Keywords: cyclization; vinyl triflates; conjugated enynones; dihydropyran ones ... See more keywords
Synthesis of O‐ and N‐Heterocycles by Silyl‐Prins Cyclization of Allylsilanes
Sign Up to like & getrecommendations! Published in 2017 at "European Journal of Organic Chemistry"
DOI: 10.1002/ejoc.201700644
Abstract: Prins cyclization has emerged as one of the most valuable methods for the construction of heterocycles. It proceeds through intramolecular addition of a π-nucleophile to an oxocarbenium or related ion. The use of electron-rich alkenes,… read more here.
Keywords: silyl prins; cyclization; synthesis heterocycles; heterocycles silyl ... See more keywords
Two Complementary Cyclization Reactions for the Chemoselective Synthesis of Spirooxindoles
Sign Up to like & getrecommendations! Published in 2017 at "European Journal of Organic Chemistry"
DOI: 10.1002/ejoc.201701413
Abstract: Two complementary cascade cyclization reactions were described, namely KHSO4-promoted [1+2+3] cyclization and TMSCl-promoted four-molecular cascade cyclization for the concise synthesis of highly functionalized spirooxindoles in excellent yields. Between them, the improved TMSCl-promoted cyclization reaction of… read more here.
Keywords: promoted cyclization; two complementary; cyclization; cyclization reactions ... See more keywords
Synthesis of Structurally Diverse Benzotriazoles via Rapid Diazotization and Intramolecular Cyclization of 1,2-Aryldiamines
Sign Up to like & getrecommendations! Published in 2019 at "European Journal of Organic Chemistry"
DOI: 10.1002/ejoc.201900463
Abstract: An operationally simple method has been developed for the preparation of N‐unsubstituted benzotriazoles by diazotization and intramolecular cyclization of a wide range of 1,2‐aryldiamines under mild conditions, using a polymer‐supported nitrite reagent and p‐tosic acid.… read more here.
Keywords: intramolecular cyclization; synthesis structurally; diazotization intramolecular; cyclization ... See more keywords
Synthesis of spirocyclic β- and γ-sultams by one-pot reductive cyclization of cyanoalkylsulfonyl fluorides.
Sign Up to like & getrecommendations! Published in 2021 at "European journal of organic chemistry"
DOI: 10.1002/ejoc.202000351
Abstract: One-pot intramolecular cyclization of novel sp3-enriched cyanoalkylsulfonyl fluorides into spirocyclic β- or γ-sultams is disclosed. The method relies on nitrile group reduction followed by sulfonylation of amino group thus formed upon mild conditions (NaBH4, NiCl2·6H2O… read more here.
Keywords: spirocyclic sultams; one pot; cyclization; cyanoalkylsulfonyl fluorides ... See more keywords