Rhodium(III)-Catalyzed C–H Activation: Ligand-Controlled Regioselective Synthesis of 4-Methyl-Substituted Dihydroisoquinolones
作者:Joyann S. Barber、Stephanie Scales、Michelle Tran-Dubé、Fen Wang、Neal W. Sach、Louise Bernier、Michael R. Collins、JinJiang Zhu、Indrawan J. McAlpine、Ryan L. Patman
DOI:10.1021/acs.orglett.9b02029
日期:2019.7.19
Rh-catalyzed C–H functionalization of O-pivaloyl benzhydroxamic acids with propene gas provides access to 4-methyl-substituted dihydroisoquinolones. Good to excellent levels of regioselectivity are achieved using [CptRhCl2]2 as a precatalyst under optimized conditions. Thorough examination of aryl/heteroaryl O-pivaloyl hydroxamic acid substrates, ligand effects on C–Hsiteselectivity, alkene scope
Rh催化O-新戊酰基苯氧肟酸的C–H官能团与丙烯气体的接触提供了被4-甲基取代的二氢异喹诺酮类化合物的途径。在优化的条件下,使用[Cp t RhCl 2 ] 2作为预催化剂,可以实现良好至优异的区域选择性。全面讨论了芳基/杂芳基O-新戊基异羟肟酸底物的检测,配体对C–H位置选择性,烯烃范围和规模证明的影响。