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Obituary
Yoshito Kishi (1937-2023)
Yoshito Kishi (1937-2023)
Professor. Yoshito Kishi,
a member of the Honorary Editorial Associates of HETEROCYCLES,
has passed away on January 9, 2023 at the age of 85.
I deeply express my regret over his death.
Kunio Ogasawara
Editor
January 13, 2023
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Communication | Regular issue | Vol 22, No. 6, 1984, pp.1335-1337
Published online, 1st January, 1970■ Reactions of 3-Dicyanomethyl-1-ethylbenzotriazolium Ylide with Acetylenic Esters
Published online, 1st January, 1970
DOI: 10.3987/R-1984-06-1335
■ Reactions of 3-Dicyanomethyl-1-ethylbenzotriazolium Ylide with Acetylenic Esters
Enrique Díez-Barra, José Elguero, and Carmen Pardo*
*Departamento de Química Orgánica, Facultad de Química, Universidad Complutense de Madridas, Ciudad Universitaria, E-28040 Madrid, Spain
Abstract
The titled compound (1) reacts with acetylenic esters (2) giving 1:1 adducts (4), via 1,3-dipolar cycloaddition. Concerning the regioselectivity of the reaction, experimental results are in agreement with theoretical calculations and correspond to an inverted polarization of the azomethineimine moiety with regard to most known examples.
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