Cyclization and annulation reactions of nitrogen-substituted cyclopropanes and cyclobutanes
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The Ag ion-catalyzed ring-opening of a 1:4 mixt. of syn- and anti-cyclopropanes I and II gave the expected mixt. of CH2:CFC(OH)MeCMe3 and (Z)-MeC(CMe3):CFCH2OH in 56 and 19% yield, resp. Under similar conditions spiro analog. III underwent Wagner-Meerwein ...
