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2004
Indole derivatives
R 0140
Zirconium Triflate-Catalyzed Reactions of Indole, 1-Methylindole, and Pyrrole
α,β-Unsaturated Ketone. — The reaction of excess indole, 1-methylindole or
47- 110 with
pyrrole with α,β-unsaturated ketones affords the corresponding trisindolyl- or trispyrrolylalkanes in the presence of Zr(OTf)4 under mild conditions. The isolated yields are
moderate to high, depending on the employed substrates. — (SHI*, M.; CUI, S.-C.;
LI, Q.-J.; Tetrahedron 60 (2004) 31, 6679-6684; State Key Lab. Organomet. Chem.,
Shanghai Inst. Org. Chem., Chin. Acad. Sci., Shanghai 200032, Peop. Rep. China;
Eng.) — Bartels
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