Results 71 to 80 of about 85,504 (285)
Synthetic utility and reactivity of N-alkynylazoles [PDF]
, 2015 textThe chemistry of N-alkynylazoles is a newly emerging area of chemistry with particular interest in heterocycle synthesis. Synthetic preparations of this class of molecule have shown an increasing presence in literature, however, the synthetic ...
Gilbreath, Bradford Lynd
core
Synthesis of formyl-thienylpyrroles : versatile building blocks for NLO materials [PDF]
, 2006 Several formyl-substituted 1-alkyl(aryl)-2-(2´-thienyl)pyrroles 3-7 were synthesized by functionalization of the pyrrole or thiophene ring of thienylpyrroles 2 using different methods: Vilsmeier formylation or metalation followed by reaction with DMF ...
Fonseca, A. Maurício C. +3 more
core +1 more source
MoleculesThe procedure for the generation of azirinyl-substituted nitrile oxides by the reaction of 2-(diazoacetyl)-2H-azirines with tert-butyl nitrite while preserving the azirine ring has been developed.
Alexander S. Dudik +4 more
doaj +1 more source
Spatial separation of pyrrole and pyrrole-water clusters [PDF]
Chemical Physics Letters, 2019 We demonstrate the spatial separation of pyrrole and pyrrole(H$_2$O) clusters from the other atomic and molecular species in a supersonically-expanded beam of pyrrole and traces of water seeded in high-pressure helium gas. The experimental results are quantitatively supported by simulations.
Johny, Melby +5 more
openaire +4 more sources
Metal-free C-H sulfonamidation of pyrroles by visible light photoredox catalysis.
Chemical Communications, 2016 We report a one-step procedure for the preparation of N-(2-pyrrole)-sulfonamides from sulfonamides and pyrroles. The reaction uses visible light, an acridinium dye as photocatalyst and oxygen as the terminal oxidant for the oxidative C-N bond formation ...
Andreas Uwe Meyer, A. Berger, B. König
semanticscholar +1 more source
Beilstein Journal of Organic Chemistry, 2015 The synthesis of N-arylated pyrroles and indoles is documented, as well as their functionalization by deprotonative metallation using the base in situ prepared from LiTMP and ZnCl2·TMEDA (1/3 equiv).
Mohamed Yacine Ameur Messaoud +12 more
doaj +1 more source
Carbohydrate-auxiliary assisted preparation of enantiopure 1,2-oxazine derivatives and aminopolyols
Beilstein Journal of Organic Chemistry, 2012 An approach to enantiopure hydroxylated 2H-1,2-oxazine derivatives is presented utilizing the [3 + 3] cyclisation of lithiated alkoxyallenes and an L-erythrose-derived N-glycosyl nitrone as precursors.
Marcin Jasiński +2 more
doaj +1 more source
Beilstein Journal of Organic Chemistry, 2020 N-(Hetero)aryl-4,5-unsubstituted pyrroles were synthesized from (hetero)arylamines, 1,3-dicarbonyl compounds, and α-bromoacetaldehyde acetal by using aluminum(III) chloride as a Lewis acid catalyst through [1 + 2 + 2] annulation.
Wenbo Huang +5 more
doaj +1 more source
Synthesis and characterization of novel second-order NLO-chromophores bearing pyrrole as an electron donor group [PDF]
, 2012 Two series of novel push-pull 1-(4-(thiophen-2-yl)phenyl)-1H-pyrroles 3-5 were designed to explore the consequence of using different electron accepting moieties linked to the thiophene at the arylthiophene bridge or to the pyrrole heterocycle which ...
Belsley, M. +3 more
core +1 more source
An efficient and facile access to highly functionalized pyrrole derivatives
Beilstein Journal of Organic Chemistry, 2018 A straightforward and one-pot synthesis of pyrrolo[3,4-c]pyrrole-1,3-diones via Ag(I)-catalyzed 1,3-dipolar cycloaddition of azomethine ylides with N-alkyl maleimide, followed by readily complete oxidation with DDQ, has been successfully developed ...
Meng Gao +5 more
doaj +1 more source