Abstract
A one-pot procedure was introduced for the synthesis of some new spiro derivatives of indenoquinoxaline containing cyclopropane ring from chalcones. The chalcones 1a-e were reacted with hydrazine hydrate and then in situ with lead(IV) acetate (LTA) and two new diastereomers 2a-e and 3a-e were prepared. The compounds 2a-e diastereoselectively produced in higher yields than 3a-e.
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