bis(diphenylphosphane)methane (dppm) has been studied. Our results indicate that in the presence of an excess of CH2Cl2 the thiolate phosphine silver derivatives are capable of exchange thiolate and chloride to form, in different proportions, the correspondent chloromethylthioether (CH2Cl(SRF)) a or methyldithioether (CH2(SRF)2) b with the fluorinated SRF groups: SC6F4H 1, SC6H4(CF3)-2 2, SC6H3F2-3,4
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.