Download PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Diels–Alder reactions between 2- or 3-vinylpyrrolo[2,3-b]pyridine with various dienophiles were investigated. The pyrido[2,3-b]indole adducts 9 and 13 obtained led us to the preparation of potential cytotoxic agents 19 and 20. ... Our research group is involved in the development of ...