585571-74-0Relevant articles and documents
Asymmetrie construction of polycyclic indoles through olefin cross-metathesis/intramolecular friedel-crafts alkylation under sequential catalysis
Cai, Quan,Zhao, Zhuo-An,You, Shu-Li
supporting information; experimental part, p. 7428 - 7431 (2009/12/26)
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New versatile route to the synthesis of tetrahydro-β-carbolines and tetrahydro-pyrano[3,4-b]indoles via an intramolecular Michael addition catalyzed by InBr3
Agnusdei, Marianna,Bandini, Marco,Melloni, Alfonso,Umani-Ronchi, Achille
, p. 7126 - 7129 (2007/10/03)
A simple multistep synthetic strategy to 4-sub-stituted 1,2,3,4-tetrahydro-β-carboline and 1,3,4,9-tetrahydro-pyrano[3,4-b]indole derivatives starting from commercially available indole 2-carboxylic acid (5) is described. The final intramolecular Michael addition promoted by catalytic amount of InBr3 (5-10 mol %) provided the expected polycyclic compounds in excellent yields (up to 97%) both in anhydrous organic and aqueous media.