Asymmetric indium-mediated Barbier-type allylation reactions with ketones to form homoallylic alcohol products
作者:Terra D. Haddad、Lacie C. Hirayama、Philip Taynton、Bakthan Singaram
DOI:10.1016/j.tetlet.2007.11.089
日期:2008.1
report a general method for the enantioselective allylation of both aromatic and aliphatic ketones under indium-mediated Barbier-type conditions. Using 2 equiv of a commercially available amino alcohol, either (1S,2R)-(+)-2-amino-1,2-diphenylethanol ((+)-1) or (1R,2S)-(−)-2-amino-1,2-diphenylethanol ((−)-1) as the chiral auxiliary, good yields and enantioselectivities were achieved. To our knowledge
我们报告了在铟介导的Barbier型条件下,芳香族和脂肪族酮的对映选择性烯丙基化的一般方法。使用2当量的市售氨基醇(1 S,2 R)-(+)-2-氨基-1,2-二苯乙醇((+)- 1)或(1 R,2 S)-(-作为手性助剂的)-2-氨基-1,2-二苯乙醇((-)- 1)具有良好的收率和对映选择性。据我们所知,本文报道的对映选择性是铟介导的酮的烯丙基化所获得的最高,特别是通过向α,α,α-三氟苯乙酮中添加得到的均烯丙基醇产物提供了80%的对映体过量。