Efficient synthesis of protected β-phenylethylamines, enantiomerically pure protected β-phenyl-α-benzylethylamines and β-phenyl-α-isopropylethylamines using organozinc chemistry
作者:Christopher Hunter、Richard F. W. Jackson、Harshad K. Rami
DOI:10.1039/a907629h
日期:——
The β-aminoalkylzinc reagents 9a, 10 and 11 have been efficiently prepared using DMF as a solvent. Palladium-catalysed coupling of these reagents with substituted aryl iodides, under mild and convenient conditions, gives protected β-phenylethylamines 6 in 72â80% yield (three examples), enantiomerically pure protected β-phenyl-α-benzylethylamines 7 in 53â61% yield (four examples), and protected β-phenyl-α-isopropylethylamines 8 in 53â79% yield (four examples).
β-氨基烷基锌试剂9a、10和11已经使用DMF作为溶剂高效制备。使用钯催化剂在温和便捷的条件下将这些试剂与取代苯基碘化物偶联,可以获得保护的β-苯乙胺6,产率为72–80%(三个例子);获得对映体纯的保护β-苯-α-苄基乙胺7,产率为53–61%(四个例子);以及保护的β-苯-α-异丙基乙胺8,产率为53–79%(四个例子)。