222415-34-1Relevant articles and documents
Access to multi-functionalized oxazolines via silver-catalyzed heteroannulation of enamides with sulfoxonium ylides
Liu, Rui-Hua,Shan, Qi-Chao,Gao, Ya,Loh, Teck-Peng,Hu, Xu-Hong
, p. 1411 - 1414 (2020/10/29)
Disclosed herein is an efficient Ag-catalyzed [4 + 1] heteroannulation reaction of enamides with α-carbonyl sulfoxonium ylides. The diastereoselective transformation provides a practical access to a diverse range of multi-functionalized oxazoline derivatives. The synthetic utility of the resultant tetra-substituted oxazolines is further demonstrated by a series of useful manipulations into valuable building blocks of pharmaceutical relevance.
Cobaloxime Catalysis for Enamine Phosphorylation with Hydrogen Evolution
Lei, Tao,Liang, Ge,Cheng, Yuan-Yuan,Chen, Bin,Tung, Chen-Ho,Wu, Li-Zhu
supporting information, p. 5385 - 5389 (2020/07/08)
Direct phosphorylation of enamine and enamide with hydrogen evolution was realized via cobaloxime catalysis under visible-light irradiation. Control experiments and spectroscopic studies demonstrated a reductive quenching pathway of cobaloxime catalyst to produce phosphinoyl radical, which underwent cross-coupling with various enamines (and enamides) to give diverse β-phosphinoyl products in good to excellent yields. More interestingly, Z/E mixture of acyclic enamines could convert into single Z-products with good reactivity.
The ruthenium-catalyzed C-H functionalization of enamides with isocyanates: Easy entry to pyrimidin-4-ones
Shi, Pengfei,Li, Song,Hu, Lu-Min,Wang, Cong,Loh, Teck-Peng,Hu, Xu-Hong
, p. 11115 - 11118 (2019/09/20)
Ruthenium-catalyzed heteroannulation between enamides and isocyanates has been realized as a complementary approach to conventional strategies for the synthesis of pyrimidin-4-ones. High step-A nd atom-economy was achieved for the rapid construction of such privileged scaffolds, which are found in a multitude of pharmaceutical compounds. The generality and practicability of this transformation were reflected by the broad scope of substrates with diverse functional groups, large-scale synthesis, and late-stage diversification.
Diphenyliodonium Ion/Et3N Promoted Csp2-H Radical Phosphorylation of Enamides
Pal, Suman,Gaumont, Annie-Claude,Lakhdar, Sami,Gillaizeau, Isabelle
supporting information, p. 5621 - 5625 (2019/08/01)
This work reports a simple and efficient method for the direct phosphorylation of enamide under metal-free conditions. The P-centered radicals, derived from secondary phosphine oxides, are generated under mild reaction conditions in the presence of diphenyliodonium salt and Et3N and are introduced onto a range of enamides in good isolated yields. The method features broad substrate scope, good functional group tolerance, and efficient scale-up.
METHOD FOR PREPARING ENAMIDE COMPOUND AND RUTHENIUM COMPLEX CATALYST USED THEREIN
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Paragraph 0141, (2017/10/27)
Provided is a method for preparing an enamide compound, which includes reacting an organic azide compound having α-hydrogen and an anhydride by addition of a ruthenium complex catalyst in the presence of an ionic liquid, and a ruthenium complex catalyst u
CATALYTIC PREPARATION OF ENAMIDES FROM ALKYL AZIDES AND ACYL DONORS
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, (2016/10/10)
The present invention relates to a method to synthesize an enamide compound by generating imine which does not have a substituent group bonded to the nitrogen from an organic azide compound and conducting a reaction of the same with acyl doner. By using t
Synthesis of Enamides by Ruthenium-Catalyzed Reaction of Alkyl Azides with Acid Anhydrides in Ionic Liquid
Pak, Han Kyu,Han, Junghoon,Jeon, Mina,Kim, Yongjin,Kwon, Yearang,Park, Jin Yong,Rhee, Young Ho,Park, Jaiwook
, p. 4030 - 4034 (2015/12/26)
Enamides were synthesized by a ruthenium-catalyzed one-pot, one-step procedure from alkyl azides and acid anhydrides. The substrate scope includes not only secondary azides, but also primary aliphatic ones to give a wide range of enamides containing vario
Directing group assisted nucleophilic substitution of propargylic alcohols via o -quinone methide intermediates: Br??nsted acid catalyzed, highly enantio- and diastereoselective synthesis of 7-alkynyl-12a-acetamido-substituted benzoxanthenes
Saha, Satyajit,Schneider, Christoph
, p. 648 - 651 (2015/03/05)
BINOL-based, chiral phosphoric acids catalyze the substitution of 1-(o-hydroxyphenyl)propargylic alcohols with enamides to furnish 7-alkynyl-12a-acetamido-substituted benzo[c]xanthenes and related heterocycles in a one-pot operation with excellent diastereo- and enantioselectivity. Ambient reaction temperature, operationally simple reaction conditions, low catalyst loading, high yields, and excellent stereocontrol are attractive features of this process and make it a highly practical and versatile transformation.
Exploiting the Nucleophilicity of N-H Imines: Synthesis of Enamides from Alkyl Azides and Acid Anhydrides
Han, Junghoon,Jeon, Mina,Pak, Han Kyu,Rhee, Young Ho,Park, Jaiwook
, p. 2769 - 2774 (2016/02/18)
The nucleophilicity of N-unsubstituted imines, which were generated from alkyl azides by a ruthenium-catalyzed reaction, was investigated in the reaction with acid anhydrides. The initial products were N-acylimines, which isomerized to the corresponding e
Rhodium(iii)-catalyzed olefinic C-H alkynylation of enamides at room temperature
Feng, Chao,Feng, Daming,Loh, Teck-Peng
, p. 9865 - 9868 (2014/08/18)
Rh(iii)-catalyzed C-H olefinic alkynylation of enamides for the stereospecific construction of synthetically useful Z-type enynamides is reported. This protocol displays good functionality tolerance and operational simplicity thus providing an alternative synthetic opportunity for the ease of access to specific 1,3-enyne derivatives.