title: Counter-ion-dependent alkyne iminium ion cyclization for divergent synthesis of N-fused indolylidine, indole, and indoline derivatives promoted by the Lewis/Bronsted acid.
abstract: Divergent synthesis of N-fused indolylidine, indole, and indoline derivatives using alkyne iminium ion cyclization is described. Trapping of vinyl cation intermediate generated after alkyne iminium ion cyclization was found to be dependent on the Lewis/Bronsted acid and solvent used. N-Fused indolylidine triflate could be used in the divergent synthesis of N-fused indole derivatives.
authors: Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
authors: Santosh J
authors: SJ
authors: Gharpure
authors: Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
authors: Yogesh G
authors: YG
authors: Shelke
authors: Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
authors: Dasari Praveen
authors: DP
authors: Kumar
mesh_terms: D000143:Acids / Q000737:chemistry*; D000480:Alkynes / Q000737:chemistry*; D003500:Cyclization; D007211:Indoles / Q000138:chemical synthesis* / Q000737:chemistry; D007477:Ions / Q000737:chemistry; D015394:Molecular Structure
chemical_list: D000143:Acids; D000480:Alkynes; D007211:Indoles; D007477:Ions