Synthesis of Spiro[2.2]pentanes and Spiro[2.3]hexanes Employing the Me<sub>3</sub>
Al/CH<sub>2</sub>
I<sub>2</sub>
Reagent
作者:Ilfir R. Ramazanov、Rita N. Kadikova、Tat'yana P. Zosim、Usein M. Dzhemilev、Armin de Meijere
DOI:10.1002/ejoc.201700991
日期:2017.12.22
Substituted alkylidenecyclopropanes reacted with 5 equivalents each of Me3Al and CH2I2 at room temperature in hexane to give 1-mono- and 1,1-disubstituted spiro[2.2]pentanes in high yields. Surprisingly, the same reaction with substituted alkylidenecyclopropanes in CH2Cl2 afforded exclusively 1,1-disubstituted spiro[2.3]hexanes. The transformation of 1,1-diphenylspiro[2.2]pentane into 1,1-diphenylspiro[2
Photooxygenation of olefins in the presence of titanium(IV) catalyst. A convienient "one-pot" synthesis of epoxy alcohols.
作者:Waldemar Adam、Martin Braun、Axel Griesbeck、Vittorio Lucchini、Eugen Staab、Bernd Will
DOI:10.1021/ja00183a032
日期:1989.1
Heuvel, C. J. M. van den; Hofland, A.; Velzen, J. C. van, Recueil des Travaux Chimiques des Pays-Bas, 1984, vol. 103, # 7-8, p. 233 - 240
作者:Heuvel, C. J. M. van den、Hofland, A.、Velzen, J. C. van、Steinberg, H.、Boer, Th. J. de
DOI:——
日期:——
Palladium- and Platinum-Catalyzed Silaboration of Methylenecyclopropanes through Selective Proximal or Distal C−C Bond Cleavage
作者:Michinori Suginome、Takanori Matsuda、Yoshihiko Ito
DOI:10.1021/ja002885k
日期:2000.11.1
Carbenoid rearrangement in the series of substituted gem-dibromospiropentanes
作者:K. N. Sedenkova、E. B. Averina、Yu. K. Grishin、T. S. Kuznetsova、N. S. Zefirov
DOI:10.1134/s1070428008070038
日期:2008.7
A series of new substituted gem-dibromospiropentanes was studied in a reaction with methyllithium at -55...-50 degrees C. This reaction is a carbenoid rearrangement that leads to the formation of monomeric and dimeric bromocyclobutenes and also to the products of cyclobutylidene insertion into a C-H bond of the solvent depending on the character of substituents in the dibromospiropentane fragment.