Tertiary amine oxides undergo the elimination of a dialkyihydroxylamine when they are heated This reaction is called the .

Options

A. Cope elimination
B. Hofmann elimination
C. Saytzeff elimination
D. Markovnikov' s elimination

Answer

A

Explanation

`underset("amine oxide")underset("A tertiary")(RCH_(2)CH_(2))underset(CH_(3))underset(|)overset( :overset(..)O:^(-))overset(|)(N^(+))-C overset(150^(@)C)rarrunderset("An alkene")(RCH=CH_(2))underset("hydroxyl amine")underset("N,N-Dimethyl-")(+:overset( :overset(..)OH)overset(|)underset(CH_(3))underset(|)(N)-CH_(3))`
This is the Coper reaction in which alkenes are formed when amine oxides are heated it is a syn elimination and proceed through a cyclic transition state The cope elimination is useful synthetically as illustrated by the synthesis of methylenecyclohexane