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R. E. Walkup and J. Linder, “2-Formylation of 3-Arylindoles,” Tetrahedron Letters, Vol. 26, No. l8, 1985, pp. 2155-2158.
http://dx.doi.org/10.1016/S0040-4039(00)98949-4

has been cited by the following article:

• TITLE: Synthesis, Characterization, Crystal Studies of (E)-3-(3-(4-Fluorophenyl)-1-isopropyl-1H-indol-2-yl) Acrylaldehyde

  AUTHORS: Veerendra Kumar A. Kalalbandi, J. Seetharamappa

  KEYWORDS: Single Crystal Structure; X-Ray Diffraction; Intermediate of Fluvastatin; Indoles

  JOURNAL NAME: Crystal Structure Theory and Applications, Vol.2 No.4, December 10, 2013

  ABSTRACT: We have synthesized and developed single crystals of the title compound (E)-3-(3-(4-fluorophenyl)-1-isopropyl-1H-indol-2-yl) acrylaldehyde, which is a key intermediate of anti-cholesterol fluvastatin drug. It crystallized under orthorhombic system with a space group Pna21. The dihedral angle between the indole mean plane and 4-F-phenyl ring was observed to be 111.5 (3)° in the title molecule. Further, strong hydrogen bonds were not found in the crystal structure.