Abstract
The alkylation of benzimidazo[1,2-b]isoquinolin-11(5H)-one has been studied. This occurs at N(5) or C(6) depending on the type of alkylating agent and the reaction conditions. It was shown that C(6) alkylation is effected in reactions with reactive alkyl halides. A repeat alkylation occurs preferentially at the same position. Interaction with o-xylylidene dibromide leads to spiro[benzimidazo[1,2-b]-isoquinolin-6,2'-indan]-11-one and 1,6-dihydro-11H-6a,11b-diazobenzo[b]benzo[5,6]cyclohepta[1,2,3-l,m]fluoren-11-one, which are derivatives of new heterocyclic systems.
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