TY - JOUR ID - 92278 TI - A clean and efficient synthesis of spiro[4H-pyran-oxindole] derivatives catalyzed by egg shell JO - Eurasian Chemical Communications JA - ECC LA - en SN - 2717-0535 AU - Youseftabar-Miri, Leila AD - Department of Chemistry, Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran Y1 - 2019 PY - 2019 VL - 1 IS - 2 SP - 142 EP - 152 KW - Spirooxindole KW - Eggshell KW - Heterogeneous catalyst KW - Isatin KW - Green chemistry DO - 10.33945/SAMI/ECC.2019.2.3 N2 - Egg shell has been utilized as a natural, green, reusable and eco-friendly reagent for the synthesis of spiro[4H-pyran-oxindole] derivatives by one-pot multicomponent reaction of isatins, 1,3-diketones, and malononitrile/ ethyl cyanoacetate. Good functional group tolerance and broad scope of usable substrates are other prominent features of the present methodology. UR - https://www.echemcom.com/article_92278.html L1 - https://www.echemcom.com/article_92278_ef9209233172ab28ed919c02f003931d.pdf ER -