Lingam; Muralimohan Rao; Bhowmik, Dipal R., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2007, vol. 46, # 12, p. 2049 - 2052
PTC‐Promoted Japp–Klingmann Reaction for the Synthesis of Indole Derivatives
摘要:
Indole derivatives have been efficiently synthesized from ethyl 2-phenylhydrazono-5-phthalimido-pentanoate and its derivatives, which were obtained by Japp-Klingmann reaction under phase-transfer catalytic (PTC) conditions. Several different phase-transfer catalysts were investigated and dimethyldioctadecyl ammonium chloride (DMDOA) was found to promote this reaction efficiently. Using DMDOA as the PTC, aryl hydrazones were obtained in yields of 90%. The pure aryl hydrazones were then efficiently cyclized to indole derivatives in yields of more than 80%.
Indole derivatives have been efficiently synthesized from ethyl 2-phenylhydrazono-5-phthalimido-pentanoate and its derivatives, which were obtained by Japp-Klingmann reaction under phase-transfer catalytic (PTC) conditions. Several different phase-transfer catalysts were investigated and dimethyldioctadecyl ammonium chloride (DMDOA) was found to promote this reaction efficiently. Using DMDOA as the PTC, aryl hydrazones were obtained in yields of 90%. The pure aryl hydrazones were then efficiently cyclized to indole derivatives in yields of more than 80%.
Lingam; Muralimohan Rao; Bhowmik, Dipal R., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2007, vol. 46, # 12, p. 2049 - 2052