81051-55-0Relevant academic research and scientific papers
Electrochemical Oxidative Cyclization: Synthesis of Polysubstituted Pyrrole from Enamines
Chen, Zhiwei,Shi, Guang,Tang, Wei,Sun, Jie,Wang, Wenxing
, p. 951 - 955 (2021/02/03)
A conceptually novel method for the preparation of pyrrole is described by electrochemical-oxidation-induced intermolecular annulation via enamines. In a simple undivided cell, based on a sodium acetate-facilitated, polysubstituted pyrrole derivations has been facilely synthesized under external oxidant-free condition. This electrosynthetic approach providing an environmentally benign protocol for C?C bond cross-coupling and oxidative annulation, which features unparalleled broad scope of substrates and practicality.
Synthesis of Functionalized Imidazolium Salts via Iodine-Mediated Annulations of Enamines
Xia, Biao,Chen, Wenjun,Zhao, Qiongli,Yu, Wenquan,Chang, Junbiao
supporting information, p. 2583 - 2587 (2019/04/17)
A novel annulation reaction of two enamine molecules with iodine under basic conditions to form 4-functionalized imidazolium salts has been established. In this reaction, iodine acts as both an iodinating reagent and a Lewis acid catalyst. Features of this synthetic method include facilitative preparation of substrates, no use of transition metals, mild reaction conditions, simplicity of operation, and gram scale synthesis.
THERAPEUTIC COMPOUNDS
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Paragraph 0122; 0123, (2018/07/06)
no abstract published
Synthesis of chiral β-amino acid derivatives by asymmetric hydrosilylation with an imidazole derived organocatalyst
Jones, Simon,Li, Xianfu
experimental part, p. 5522 - 5532 (2012/09/21)
The organocatalysed asymmetric hydrosilylation of a number of N-aryl and alkyl β-substituted enamino esters proceeds in generally good yield and enantioselectivity. Crucial to obtaining high yield and selectivity was the addition of benzoic acid as an additive and under these conditions, both N-alkyl and N-aryl substituents were well tolerated. β-Aryl and alkyl substituents were evaluated and a model proposed to account for the experimental observations based upon enamine tautomerisation and conformational preferences of the reactive ketimine intermediate.
Bismacrocyclic inhibitors of hepatitis C NS3/4a protease
McCauley, John A.,Rudd, Michael T.,Nguyen, Kevin T.,McIntyre, Charles J.,Romano, Joseph J.,Bush, Kimberly J.,Varga, Sandor L.,Ross III, Charles W.,Carroll, Steven S.,DiMuzio, Jillian,Stahlhut, Mark W.,Olsen, David B.,Lyle, Terry A.,Vacca, Joseph P.,Liverton, Nigel J.
supporting information; experimental part, p. 9104 - 9107 (2009/02/08)
(Chemical Equation Presented) Double time: The bismacrocycle 2 was prepared from 1 by a selective double ring-closing metathesis (RCM) reaction to form the 18- and 15-membered rings simultaneously. Derivative 3 shows excellent potency against NS3/4a protease.
HCV NS3 PROTEASE INHIBITORS
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Page/Page column 39, (2008/12/05)
The present invention relates to macrocyclic compounds of formula (I) that are useful as inhibitors of the hepatitis C virus (HCV) NS3 protease, their synthesis, and their use for treating or preventing HCV infections.
HCV NS3 PROTEASE INHIBITORS
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Page/Page column 48, (2008/06/13)
The present invention relates to macrocyclic compounds of formula (I) that are useful as inhibitors of the hepatitis C virus (HCV) NS3 protease, their synthesis, and their use for treating or preventing HCV infections. I
A chemical evidence of reiochemistry in the Diels-Alder reaction of 4- oxygenated quinolinequinones with 1-methoxy-3-trimethylsilyloxy- 1,3- butadienes
Horiguchi, Yoshie,Tomoda, Katsuhiro,Sano, Takehiro
, p. 1669 - 1680 (2007/10/03)
The synthesis of four regioisomeric azaanthraquinones (4a, b and 5a, b) was achieved in a regioselective manner by the Diels-Alder reaction of 4- oxygenated 6-bromo- and 7-bromoquinolinequinones (11 and 15) with 1-methoxy- 3-trimethylsilyloxy-1,3-butadien
Dioxopyrrolines. XXVII. Syntheses of 2-Aryl-3-ethoxycarbonyl-Δ2-pyrroline-4,5-diones
Sano, Takehiro,Horiguchi, Yoshie,Toda, Jun,Imafuku, Kazue,Tsuda, Yoshisuke
, p. 497 - 503 (2007/10/02)
2-Aryl-3-ethoxycarbonyl-Δ2-pyrroline-4,5-diones (3) were easily prepared in good yields by condensation of enamino-esters (2) with oxalyl chloride.The products were characterized by ultraviolet and infrared spectroscopy. Keywords - Δ2-pyrroline-4,5-dione; dioxopyrroline; enamino-ester; ethyl 3-aryl-3-aminopropenoate; 2-aryl-3-ethoxycarbonyl-Δ2-pyrroline-4,5-dione; UV; restricted rotation
OXIDATION OF ENAMINE-ESTERS WITH LEAD TETRA-ACETATE - PART 3. β-AMINOCINNAMATES AND β-AMINOCROTONATES
Sukari, Mohamed A.,Vernon, John M.
, p. 793 - 796 (2007/10/02)
Oxidation of β-aminocinnamates and β-aminocrotonates with lead tetra-acetate gives fully substituted pyrrole-3,4-diesters.
