Synthesis of benzo-derivatives of 1,2,6-oxatellurazocine

Dehydrobromination reaction is used for synthesis of unknown earlier 1,2,6-oxatellurazocine benzo-derivatives (1). 2-(2-bromo-tellurio-1-cyclohexenyl-methyl- amino)phenols (2) can serve as initial compounds for preparation of the last named. Synthesis of the (2) imines was performed by reaction of 2-dibromotellurio-1-cyclohexene carbaldehyde (3) with o-amino phenols. As in preparation of series of other azomethines the reaction was attempted with elimination of methyl bromyl molecules and could result to (2) azomethines with the yield of 78-85 %. At treatment of suspensions of (2) azomethines in benzene by equimolar amount of triethylamine with following temporary boiling of reaction mixtures (1) heterocycles with the yield of 71-87 % were obtained