Synthesis of a Novel C2-Symmetric Bis-oxazoline (=Bis[4,5-dihydrooxazole]) and Its Application as Chiral Ligand in Asymmetric Transition Metal Catalysis
作者:Yaşar Gök、Johan Van der Eycken
DOI:10.1002/hlca.201100440
日期:2012.5
C2‐symmetric bis‐oxazoline (=bis[4,5‐dihydrooxazole]) 2 with a chiral trans‐(2R,3R)‐2,3‐bis(3,5‐diphenylphenyl)cyclopropylidene (=trans‐(2R,3R)‐2,3‐bis([1,1′: 3′,1″‐terphenyl]‐5′‐yl)cyclopropylidene) backbone was efficiently synthesized (Scheme). All synthetic steps were easy to perform and led to the desired product in good overall yields. Compound 2 was tested and compared as ligand in several enantioselective
具有手性反式-(2 R,3 R)-2,3-双(3,5-二苯基苯基)环亚丙基(=反式)的新型C 2-对称双恶唑啉(= bis [4,5-二氢恶唑])2高效地合成了-(2 R,3 R)-2,3-双([1,1':3',1''-三联苯] -5'-基)环亚丙基)骨架(方案)。所有合成步骤均易于实施,并以良好的总收率生产出所需的产品。化合物2 在几种对映选择性催化反应中,例如钯(0)催化的对映选择性烯丙基烷基化反应和铜(I)催化的对映选择性环丙烷化和叠氮化反应中,作为配体进行了测试和比较。