Synthesis of 2,2′,6-Trisubstituted and 2,2′,6,6′-Tetrasubstituted Diaryl Sulfides and Diaryl Sulfones by Copper-Promoted Coupling and/or Ortholithiation
作者:Jonathan Clayden、James Senior
DOI:10.1055/s-0029-1217986
日期:2009.10
highly sterically encumbered 2,6-disubstituted thiophenols and aryl iodides to form hindered diarylsulfides. Hindered diarylsulfones may be made in a complementary fashion by ortholithiation of the sulfone oxidation products of less hindered diarylsulfides.
preference exhibited by a diaryl sulfone axis lying ortho to a sulfinyl substituent enabled the dynamic resolution of atropisomeric diaryl sulfones under thermodynamic control (see scheme; e.r.=enantiomeric ratio). These compounds are the first resolvable compounds exhibiting atropisomerism at CS bonds.
与亚磺酰基取代基邻位的二芳基砜轴表现出的强大构象偏好使得能够在热力学控制下动态拆分阻转异构体二芳基砜(参见方案; er =对映体比率)。这些化合物是第一个在CS键上表现出对映异构性的可拆分化合物。