Regiochemical control in the reductive cleavage of 2-alkylated oxetanes by use of trialkylaluminums. Tertiary organolithiums with .gamma.-oxy functionality
摘要:
Whereas 2,2-dialkylated oxetanes are cleaved by lithium 4,4'-di-tert-butylbiphenylide to provide the primary organolithium-tertiary oxyanions, the same reaction in the presence of trialkylaluminums gives exclusively the 3-lithio-3,3-disubstituted propoxides, which are trapped by carbonyl compounds in moderate yields.