Synthesis and Application of Chiral Spiro Phospholane Ligand in Pd-Catalyzed Asymmetric Allylation of Aldehydes with Allylic Alcohols
作者:Shou-Fei Zhu、Yun Yang、Li-Xin Wang、Bin Liu、Qi-Lin Zhou
DOI:10.1021/ol050556x
日期:2005.6.1
monodentate spiro phenylphospholane ligand 4 was prepared from a readily accessible, enantiomerically pure 1,1'-spirobiindane-7,7'-diol in high yield. This ligand has proven to be efficient for Pd-catalyzed enantioselective allylation of aldehydes with allylic alcohols. Aromatic, heteroaromatic, and aliphatic aldehydes gave homoallylic alcohols in good enantioselectivities (up to 83% ee) and excellent
[反应:见正文]由易于获得的对映体纯的1,1'-螺双茚满-7,7'-二醇以高收率制备了新型手性单齿螺苯基苯基膦烷配体4。该配体已经证明对于醛与烯丙基醇的钯催化的对映选择性烯丙基化是有效的。芳族,杂芳族和脂族醛类均苯醇具有良好的对映选择性(最高83%ee)和出色的抗非对映选择性(最高99:1 dr)。