Abstract:The isomeric 7-t-butylbicyclo[2.2.1 Ihept-2-en-7-01s afford isomeric dienes (7-methyl-7-(2'-propeny1)-bicyclo[2.2.l]hept-2-enes) by Wagner-Meerwein rearrangement on treatment with thionyl bromide or acid. Methyl migration in the nonclassical 7-/-butylbicyclo[2.2.l]hept-2-en-7-yl cation intermediate occurs with a substantial syn preference, in sharp contrast to the anti preference exhibited in capture of similar cations by external nucleophiles. The result is interpreted in terms of a steric factor.Les t-butyl-… Show more
Es wird die Wagner‐Meerwein‐Umlagerung der isomeren 7‐tert.‐Butyl‐bicyclo‐ [2.2.1]hepten‐(2)‐ole‐(7) in Gegenwart von Thionylbromid oder Säure zu den isomeren 7‐Methyl‐7‐[propenyl‐(2)]‐bicyclo[2.2.1]heptenen‐(2) untersucht.
Es wird die Wagner‐Meerwein‐Umlagerung der isomeren 7‐tert.‐Butyl‐bicyclo‐ [2.2.1]hepten‐(2)‐ole‐(7) in Gegenwart von Thionylbromid oder Säure zu den isomeren 7‐Methyl‐7‐[propenyl‐(2)]‐bicyclo[2.2.1]heptenen‐(2) untersucht.
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