Applications of Enantioselective Carbolithiation of Ortho-Substituted β-Methylstyrenes
作者:Anne-Marie L. Hogan、Thomas Tricotet、Alastair Meek、Shaista S. Khokhar、Donal F. O’Shea
DOI:10.1021/jo800941h
日期:2008.8.1
The enantioselective carbolithiation of ortho-substituted (E)-β-methylstyrenes provides access to chiral lithiated intermediates with broad synthetic potential. Specifically, β-methylstyrenes with o-aminomethyl, ether, and oxazoline groups have been employed in the synthesis of chiral aromatics and heteroaromatics such as isoquinolines, isoquinolinones, benzofurans, and isobenzofuranones.
In the presence of 3 equivalents of MeLi, various Grignard reagents reacted with secondary α,β-unsaturated amides and α,β-unsaturated carboxylic acids to give the corresponding Michael adducts in g...