Chiral isoxazolidine-mediated stereoselective umpolung α-phenylation of methyl ketones
作者:Norihiko Takeda、Mizuki Furuishi、Yuri Nishijima、Erika Futaki、Masafumi Ueda、Tetsuro Shinada、Okiko Miyata
DOI:10.1039/c8ob02480d
日期:——
An effective asymmetric α-phenylation of methyl ketones with triphenylaluminium in the presence of (+)-benzopyranoisoxazolidine has been developed. The reaction proceeds via the in situ formation of a chiral N-alkoxyenamine and the subsequent diastereoselective nucleophilic phenylation to provide α-phenylated products in moderate to good yields, with high enantioselectivities.
已经开发出在(+)-苯并吡喃并恶恶唑烷存在下,有效的甲基酮与三苯基铝的不对称α-苯基化反应。反应的进行通过所述原位形成手性的Ñ -alkoxyenamine和随后的非对映选择性亲核苯基化,以提供α-苯基化产品在中度至良好的产率,具有高对映选择性。