?-Chlor-nitrone V: Substitutionsreaktionen an Olefin- und Benzolderivaten. Eine Methode zur Darstellung von ?,?-un-ges�ttigten und ?- arylsubstituierten Aldehyden. Stereospezifische Bildung von tetra-alkylsubstituierten Olefindoppelbindungen. �ber synthetische Methoden, 9. (vorl�ufige) Mitteilung
The Ag+-induced α-chloro-aldonitrone/olefin reaction in polar solvents can proceed by substitution, thereby providing a method for the preparation of β, γ-unsaturated aldehydes. Positional as well as configurational retention of the olefinic double bond are mechanistically significant and preparatively useful characteristics of this process. Substitution also occurs with great ease at nucleophilic
?-Chlor-nitrone I: Darstellung und Ag+-induzierte Reaktion mit Olefinen. �ber synthetische Methoden, 5. (vorl�ufige) Mitteilung
作者:U. M. Kempe、T. K. Das Gupta、K. Blatt、P. Gygax、Dorothee Felix、A. Eschenmoser
DOI:10.1002/hlca.19720550640
日期:1972.7.10
that would undergo cycloaddition reactions with any isolated olefinic doublebond, in contrast to most of the classical Diels-Alder or 1,3-dipolar addition reagents which, as a rule, require activated olefins in order to participate smoothly in cycloaddition processes. This paper introduces α-chloronitrones as precursors of a new class of such reagents; they undergo an Ag+-induced reaction with unactivated