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Vila Descals, Carlos; Amr, Fares Ibrahim; Blay Llinares, Gonzalo; Muñoz, M. Carmen; Pedro, José Ramón | |||
Aquest document és un/a article, creat/da en: 2016 | |||
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An efficient one‐pot asymmetric synthesis of pyrazoles bearing a chiral quaternary stereocenter has been developed. Quinine‐derived thiourea catalyzed the enantioselective addition of pyrazolones to isatin‐derived ketimines, providing the corresponding acetylated pyrazoles after in situ treatment with Ac2O/Et3N. The corresponding pyrazoles were afforded in high yields and excellent enantioselectivities. | |||
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