Molecular Recognition of α,β-Unsaturated Carbonyl Compounds Using Aluminum Tris(2,6-diphenylphenoxide) (ATPH): Structural and Conformational Analysis of ATPH Complexes and Application to the Selective Vinylogous Aldol Reaction
作者:Susumu Saito、Takashi Nagahara、Masahito Shiozawa、Masakazu Nakadai、Hisashi Yamamoto
DOI:10.1021/ja0205941
日期:2003.5.1
Various alpha,beta-unsaturated carbonyl compounds were coordinated with aluminum tris(2,6-diphenylphenoxide) (ATPH) to give the corresponding Lewis acid-base complexes in a distinctive coordination fashion (selective coordination). ATPH recognizes carbonyl substrates and subsequently orients itself as it forms a stable complex through selective coordination with the carbonyl oxygen. Selective coordination
各种α,β-不饱和羰基化合物与铝三(2,6-二苯酚) (ATPH) 协调,以独特的配位方式(选择性配位)提供相应的路易斯酸碱配合物。ATPH 识别羰基底物,随后通过与羰基氧的选择性配位形成稳定的复合物,从而使自身定向。在ATPH的空间和电子影响下,选择性配位还赋予每个羰基化合物构象偏好,这使得α,β-不饱和羰基化合物的乙烯基醛醇反应能够产生具有不同区域和立体选择性的相应γ-醛醇产物。