New Strategies for the Functionalization of Alkenes Exploiting Tethering Chemistry and Ring Strain
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Alkylidenetriphenylphosphoranes (I) tend in general towards cis olefination. The proportion of cis olefin in the isomer mixt. is highest when the ylide used is salt-free. Li salts favor the formation of the trans isomers. Salt-free I and BzH in 4:1 C6H6-pe ...
The halogen metal interconversion between BuLi and PhI yields cryst. PhLi of about 99.8% purity, if certain reaction conditions are applied. Similarly, other pure aryllithium compds. have been prepd. 15 references. [on SciFinder (R)] ...