Synthesis 2020; 52(21): 3263-3271
DOI: 10.1055/s-0040-1707864
special topic
© Georg Thieme Verlag Stuttgart · New York

Nucleophilic Cyclization/Electrophilic Substitution of (2,2-Dialkoxyethyl)ureas: Highly Regioselective Access to Novel 4-(Het)arylimidazolidinones and Benzo[d][1,3]diazepinones

Authors

  • Andrey V. Smolobochkin

    a   Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, 420088, Arbuzova str., 8, Kazan, Russian Federation   eMail: smolobochkin@iopc.ru
  • Almir S. Gazizov

    a   Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, 420088, Arbuzova str., 8, Kazan, Russian Federation   eMail: smolobochkin@iopc.ru
  • Nazerke K. Otegen

    b   Kazan National Research Technological University, Karl Marx str., 68, 420015 Kazan, Russian Federation
  • Julia K. Voronina

    c   N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky Ave., 31, 119991 Moscow, Russian Federation
    d   G.V. Plekhanov Russian University of Economics, Stremyanny Per., 36, 117997 Moscow, Russian Federation
  • Anna G. Strelnik

    a   Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, 420088, Arbuzova str., 8, Kazan, Russian Federation   eMail: smolobochkin@iopc.ru
  • Aida I. Samigullina

    a   Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, 420088, Arbuzova str., 8, Kazan, Russian Federation   eMail: smolobochkin@iopc.ru
  • Alexander R. Burilov

    a   Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, 420088, Arbuzova str., 8, Kazan, Russian Federation   eMail: smolobochkin@iopc.ru
  • Michail A. Pudovik

    a   Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, 420088, Arbuzova str., 8, Kazan, Russian Federation   eMail: smolobochkin@iopc.ru

The synthetic part of this work was made with financial support from the government assignment for the Federal Research Center, Kazan Scientific Center of the Russian Academy of Sciences. The X-ray studies were supported by Russian Science Foundation (Grant No. 19-13-00238). The X-ray measurements were performed using shared experimental facilities supported by an Institute of General and Inorganic Chemistry, Russian Academy of Sciences state assignment.
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Publikationsverlauf

Received: 26. März 2020

Accepted after revision: 15. Mai 2020

Publikationsdatum:
10. Juni 2020 (online)


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Published as part of the Special Topic Recent Advances in Amide Bond Formation

Abstract

Imidazolidin-2-one and 1,3-benzodiazepin-2-one scaffolds are structural motifs of many biologically active compounds. Herein, we report a highly regioselective acid-catalyzed intramolecular nucleophilic cyclization/intermolecular electrophilic substitution reaction sequence of (2,2-dialkoxyethyl)ureas. The reaction benefits from readily available starting materials, a simple workup procedure, moderate to high yields of target compounds, and provides a convenient entry to previously unknown 4-(het)arylimidazolidinones and 5-(het)arylbenzodiazepinones. The proposed mechanism of the reaction is also discussed.

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