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

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
,
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
› Author Affiliations
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.
Further Information

Publication History

Received: 26 March 2020

Accepted after revision: 15 May 2020

Publication Date:
10 June 2020 (online)


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.

Supporting Information