Synthesis of N-Substituted Indoles via Aqueous Ring-Closing Metathesis
Sign Up to like & getrecommendations! Published in 2020 at "Catalysis Letters"
DOI: 10.1007/s10562-020-03271-3
Abstract: Abstract We report herein the synthesis of N -substituted indoles resulting from the ring-closing metathesis of indole precursors bearing N -terminal alkenes. The aqueous metathesis of the indole precursors gave good yields of N -substituted… read more here.
Keywords: metathesis; synthesis substituted; closing metathesis; substituted indoles ... See more keywords
Ultrafast ring-closing reaction dynamics of a photochromic furan-based difurylethene
Sign Up to like & getrecommendations! Published in 2017 at "Chemical Physics Letters"
DOI: 10.1016/j.cplett.2016.12.034
Abstract: Abstract The ultrafast photoinduced ring-closing dynamics of a furan-based difurylethene (YnPhT) has been investigated by femtosecond transient absorption spectroscopy. We performed time-dependent density functional theory (TD-DFT) calculations to explain the experimental results in detail. The… read more here.
Keywords: furan based; based difurylethene; closing reaction; ring closing ... See more keywords
Ring-closing depolymerization of polytetrahydrofuran to produce tetrahydrofuran using heteropolyacid as catalyst
Sign Up to like & getrecommendations! Published in 2017 at "Polymer Degradation and Stability"
DOI: 10.1016/j.polymdegradstab.2017.08.001
Abstract: Abstract This paper mainly explores the degradation of polytetrahydrofuran to prepare tetrahydrofuran. Various catalysts including different Lewis' acids and protonic acids are investigated in the degradation process of polytetrahydrofuran. The results show that heteropolyacids exhibit… read more here.
Keywords: degradation; catalyst; tetrahydrofuran; phosphotungstic acid ... See more keywords
Multiphotochromism in an Asymmetric Ruthenium Complex with Two Different Dithienylethenes.
Sign Up to like & getrecommendations! Published in 2017 at "Inorganic chemistry"
DOI: 10.1021/acs.inorgchem.7b02023
Abstract: An asymmetric bis(dithienylethene-acetylide) ruthenium(II) complex trans-Ru(dppe)2(L1o)(L2o) (1oo) incorporating two different dithienylethene-acetylides (L1o and L2o) was designed to modulate multistate photochromism in view of the well separated ring-closing absorption bands between L1o and L2o. Upon irradiation… read more here.
Keywords: ruthenium complex; trans dppe; l1o l2o; two different ... See more keywords
Reaction Mechanism of Ring-Closing Metathesis with a Cationic Molybdenum Imido Alkylidene N-Heterocyclic Carbene Catalyst
Sign Up to like & getrecommendations! Published in 2020 at "Organometallics"
DOI: 10.1021/acs.organomet.0c00311
Abstract: DFT calculations were carried out to explore all relevant pathways for the ring-closing metathesis (RCM) reaction of a cationic molybdenum imido alkylidene N-heterocyclic carbene (NHC) catalyst wit... read more here.
Keywords: imido alkylidene; cationic molybdenum; alkylidene heterocyclic; molybdenum imido ... See more keywords
Competition between Ring-Closing Migratory Insertion Polymerization and Monomer Cyclization
Sign Up to like & getrecommendations! Published in 2020 at "Organometallics"
DOI: 10.1021/acs.organomet.0c00346
Abstract: Migratory insertion polymerization (MIP) of PFpR [PFp = (PPh2(CH2)3Cp)Fe(CO)2, R = (CH2)4CH═CH2 or (CH2)5CH3] (1) involved competitive MIP ring-closing polymerization and monomer cyclization (MC), ... read more here.
Keywords: migratory insertion; polymerization monomer; polymerization; monomer cyclization ... See more keywords
Macrolactam Synthesis via Ring-Closing Alkene-Alkene Cross-Coupling Reactions.
Sign Up to like & getrecommendations! Published in 2020 at "Organic letters"
DOI: 10.1021/acs.orglett.0c03801
Abstract: Reported herein is a practical method for macrolactam synthesis via a Rh(III)-catalyzed ring closing alkene-alkene cross-coupling reaction. The reaction proceeded via a Rh-catalyzed alkenyl sp2 C-H activation process, which allows access to macrocyclic molecules of… read more here.
Keywords: alkene alkene; macrolactam synthesis; closing alkene; synthesis via ... See more keywords
E-Selective Ring-Closing Metathesis in α-Helical Stapled Peptides Using Carbocyclic α,α-Disubstituted α-Amino Acids.
Sign Up to like & getrecommendations! Published in 2022 at "Organic letters"
DOI: 10.1021/acs.orglett.1c04256
Abstract: We present an E-selective ring-closing metathesis reaction in α-helical stapled peptides at positions i and i + 4. The use of two chiral carbocyclic α,α-disubstituted α-amino acids, (1S,3S)-Ac5c3OAll and (1R,3S)-Ac5c3OAll, provides a high E-selectivity of… read more here.
Keywords: selective ring; ring closing; helical stapled; amino acids ... See more keywords
Diastereoselective Synthesis of Bicyclo[3.3.0]octenones by Copper-Catalyzed Transannular Ring-Closing Reaction.
Sign Up to like & getrecommendations! Published in 2022 at "Organic letters"
DOI: 10.1021/acs.orglett.2c02163
Abstract: A novel and efficient copper-catalyzed transannular ring-closing reaction of eight-membered rings has been developed that provides a straightforward way to synthesize bicyclo[3.3.0]octane derivatives in good yields. Mechanistic studies revealed that the reaction pathway might involve… read more here.
Keywords: reaction; catalyzed transannular; transannular ring; closing reaction ... See more keywords
Enantioselective Synthesis of cis- and trans-Cycloheptyl β-Fluoro Amines by Sequential aza-Henry Addition/Ring-Closing Metathesis.
Sign Up to like & getrecommendations! Published in 2023 at "Organic letters"
DOI: 10.1021/acs.orglett.2c04285
Abstract: The synthesis of 7-membered carbocyclic β-fluoroamines is accomplished by a combination of the enantioselective aza-Henry reaction of aliphatic N-Boc imines and ring-closing metathesis. Use of reductive denitration gives both diastereomers of the β-fluoro amine carbocycle,… read more here.
Keywords: closing metathesis; aza henry; ring closing; synthesis ... See more keywords
Stereoselective Synthesis of Highly Substituted O-Heterocycles via Matteson Homologation: A Ring-Closing Metathesis Approach.
Sign Up to like & getrecommendations! Published in 2023 at "Organic letters"
DOI: 10.1021/acs.orglett.3c01099
Abstract: Matteson homologations of chiral boronic esters with the aid of unsaturated nucleophiles are powerful for gaining access to a range of different O-heterocycles via subsequent ring-closing metatheses. Using this protocol, six- to eight-membered rings become… read more here.
Keywords: synthesis highly; heterocycles via; stereoselective synthesis; matteson ... See more keywords