Results 61 to 70 of about 17,027 (206)

Chemo-enzymatic synthesis of pyrazines and pyrroles [PDF]

, 2018
Herein we report the biocatalytic synthesis of substituted pyrazines and pyrroles using a transaminase to mediate the key amination of the ketone precursors.
Turner, Nicholas John; id_orcid, Anthony P. Green, Xu, Jin, Green, Anthony; id_orcid, Nicholas J. Turner, Jin Xu   +5 more
core   +1 more source

Synthesis and Reactivity of New 1-Pentafluorophenyl-1Hpyrrole Derivatives

Molecules, 2003
We present 1-pentafluorophenyl-1H-pyrrole and some of its electrophilic substitution reactions: formylation and acetylations. The 2-substituted products formed in these reactions are selectively and in high yield converted into 3-substituted products by ...
Daniel Végh, Katarína Hrnčariková   +1 more
doaj   +1 more source

Synthesis of Non-Aromatic Pyrroles Based on the Reaction of Carbonyl Derivatives of Acetylene with 3,3-Diaminoacrylonitriles

Molecules, 2023
The reaction of 3,3-diaminoacrylonitriles with DMAD and 1,2-dibenzoylacetylene was studied. It is shown that the direction of the reaction depends on the structure both of acetylene and of diaminoacrylonitrile. In the reaction of DMAD with acrylonitriles
Pavel S. Silaichev, Lidia N. Dianova, Tetyana V. Beryozkina, Vera S. Berseneva, Andrey N. Maslivets, Vasiliy A. Bakulev   +5 more
doaj   +1 more source

A facile route to pyrroles, isoindoles and hetero fused analogues [PDF]

, 2002
Enamino acids derived from 1,2-dimethylaminomethylene- or 1,2-hydroxymethylene-carbonyl compounds and amino acids undergo a decarboxylative cyclisation to pyrroles, isoindoles and other fused pyrroles. A two atom ring expansion occurs preferentially with
Christopher D. Gabbutt, Gabbutt, Christopher D., B. Mark Heron, Samantha L. Pugh, Pugh, Samantha L., Hepworth, John D., Heron, B. Mark, John D. Hepworth   +7 more
core   +1 more source

Pyrrolate-Catalyzed Conjugate Addition of Pyrrole to Electron-Deficient Alkenes

Synlett, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Richardson, Robert D., Hernandez-Juan, Felix A., Dixon, Darren J.   +2 more
openaire   +3 more sources

Divergent synthesis of 2,3-dihydro-1H-pyrroles, 3-alkyl-1H-pyrroles and 3-alkenyl-1H-pyrroles from 2,4-pentadienenitriles and isocyanides [PDF]

, 2014
An efficient and divergent one-pot synthesis of 2,3-dihydro-1H-pyrroles, 3-alkyl-1H-pyrroles and 3-alkenyl-1H-pyrroles from readily accessible 2,4-pentadienenitriles with isocyanide based on reaction condition selection has been described.
Liang,Yongjiu, Liu, Xu, Dong,Dewen, Xin, Xiaoqing, Zhang, Dingyuan, Hana,Fushe, Zhang,Rui   +6 more
core  

Synthesis of Tetrasubstituted Pyrroles from Terminal Alkynes and Imines [PDF]

, 2016
Tetrasubstituted pyrroles can be obtained via the reaction of terminal alkynes and imines using nBuLi as the base in one step with high chemoselectivity (method 1).
Dongping Wang (134633), Chunxiang Wang (1748512), Yancheng Hu (1819651), Fan Wu (43375), Boshun Wan (1546000)   +4 more
core   +1 more source

Azirinyl-Substituted Nitrile Oxides: Generation and Use in the Synthesis of Isoxazole Containing Heterocyclic Hybrids

Molecules
The 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, Timur O. Zanakhov, Ekaterina E. Galenko, Mikhail S. Novikov, Alexander F. Khlebnikov   +4 more
doaj   +1 more source

Selective One-Pot Multicomponent Synthesis of N-Substituted 2,3,5-Functionalized 3-Cyanopyrroles via the Reaction between α-Hydroxyketones, Oxoacetonitriles, and Primary Amines

Molecules, 2022
A one-step, three-component reaction between α-hydroxyketones, oxoacetonitriles, and primary amines gives N-substituted 2,3,5-functionalized 3-cyanopyrroles with complete selectivity in up to 90% isolated yields.
Mengxin Xia, Ziad Moussa, Zaher M. A. Judeh   +2 more
doaj   +1 more source

Polystyrenesulfonate-catalyzed synthesis of novel pyrroles through Paal-Knorr reaction [PDF]

, 2012
Background: The classical Paal-Knorr reaction is one of the simplest and most economical methods for the synthesis of biologically important and pharmacologically useful pyrrole derivatives.
Reddy, Ashwini, Mandira Banik, Ashwini Reddy, Ramirez, Bianca, Bandyopadhyay, Debasish, Bimal K Banik, Banik, Mandira, Banik, Bimal K., Debasish Bandyopadhyay, Bianca Ramirez   +9 more
core   +2 more sources