Cs<sub>2</sub>CO<sub>3</sub>-promoted methylene insertion into disulfide bonds using acetone as a methylene source
作者:Qian Chen、Guodian Yu、Xiaofeng Wang、Yulin Huang、Yan Yan、Yanping Huo
DOI:10.1039/c8ob00877a
日期:——
An efficient halogen-free Cs2CO3-promoted methylene insertion into disulfide bonds has been achieved using acetone as a methylene source under mild conditions. This method provides a convenient and practical route to dithioacetals in up to 96% yield with good functional group compatibility.
使用丙酮作为亚甲基源,在温和的条件下,已经实现了有效的无卤素,由Cs 2 CO 3促进的亚甲基插入二硫键的过程。该方法为二硫缩醛的制备提供了便捷实用的途径,产率高达96%,并且具有良好的官能团相容性。
Sc(OTf)<sub>3</sub>-Catalyzed Synthesis of Symmetrical Dithioacetals and Bisarylmethanes Using Nitromethane as a Methylene Source
作者:Dattatraya H. Dethe、Manmohan Shukla、Balu D. Dherange
DOI:10.1021/acs.orglett.0c01831
日期:2020.8.7
Use of nitromethane as an electrophilic methylene source for the synthesis of symmetrical dithioacetals and bisarylmethanes has been showcased using Sc(OTf)(3) as a catalyst. The procedure allows straightforward access to the densely functionalized dithioacetals and bisarylmethanes under mild conditions. Additionally, the method has been applied for the synthesis of antimalarial tetramethyl mellotojaponin C and anticancer dimeric phloroglucinol derivative.