Metal- and solvent-free, iodine-catalyzed cyclocondensation and C H bond sulphenylation: A facile access to C-4 sulfenylated pyrazoles via a domino multicomponent reaction
摘要:
We describe herein a green and efficient MCRs protocol to synthesize C-4 sulfenylated pyrazoles by iodine-catalyzed cyclocondensation and direct C-H bond sulphenylation reactions. Through this protocol, two new C-N bonds and one C-S bond are constructed simultaneously in a single step. This method provides a straightforward and sustainable way to construct valuable sulfenylated pyrazoles under metal- and solvent-free conditions. (C) 2017 Published by Elsevier Ltd.
Direct sulfonylation of pyrazolones with sodium sulfinates catalyzed by TBAI in water
作者:Li-Xia Li、Dao-Qing Dong、Shuang-Hong Hao、Zu-Li Wang
DOI:10.1016/j.tetlet.2018.03.023
日期:2018.4
An efficient sulfonylation reaction of pyrazolones with sodium sulfinates catalyzed by TBAI was established. A wide variety of valuable sulfonated pyrazolones were obtained in good to excellent yields using water as solvent. (C) 2018 Elsevier Ltd. All rights reserved.
Metal- and solvent-free, iodine-catalyzed cyclocondensation and C H bond sulphenylation: A facile access to C-4 sulfenylated pyrazoles via a domino multicomponent reaction
作者:Pengfei Sun、Daoshan Yang、Wei Wei、Xuejun Sun、Wenhui Zhang、Hui Zhang、Yu Wang、Hua Wang
DOI:10.1016/j.tet.2017.02.046
日期:2017.4
We describe herein a green and efficient MCRs protocol to synthesize C-4 sulfenylated pyrazoles by iodine-catalyzed cyclocondensation and direct C-H bond sulphenylation reactions. Through this protocol, two new C-N bonds and one C-S bond are constructed simultaneously in a single step. This method provides a straightforward and sustainable way to construct valuable sulfenylated pyrazoles under metal- and solvent-free conditions. (C) 2017 Published by Elsevier Ltd.