Organolithium chemistry of N-heterocycles. Part IV. Formation of 1,2,4,5-tetrahydro-4,4-diphenyl-2,5-methano-3,1-benzoxazepines from quinolines
Abstract
Certain quinolines react with the anion (Ph2COLi)– derived from benzophenone and excess of lithium to give high yields of 1,2,4,5-tetrahydro-4,4-diphenyl-2,5-methano-3,1 -benzoxazepines (I). These may be smoothly converted by 70% sulphuric acid into 4-(diphenylmethyl) quinolines (VIII).
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