Easy Access to (n+ 3)-Dimethylamino-1-ethenylbicyclo [n. 1.0] alkanes and their Facile Conversion to Ring-annelated Cyclopentadienes

T Voigt, H Winsel, A de Meijere

Index: Voigt, Tobias; Winsel, Harald; De Meijere, Armin Synlett, 2002 , # 8 p. 1362 - 1364

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Citation Number: 7

Abstract

Abstract Aminocyclopropanation of 1-ethenylcycloalkenes 2a-d with N, N-dibenzyl-and N, N- dimethylformamide, respectively, by treatment with cyclohexylmagnesium bromide in the presence of methyltitanium triisopropoxide yielded the exo-(n+ 3)-N, N-dimethylamino-1- ethenylbicyclo [n. 1.0] alkanes 3a-d (58-72%). Compounds 7b-d could be transformed by thermal vinylcyclopropane to cyclopentene rearrangement to the corresponding exo-4- ...