Synthesis, Optical Resolution, and Stereochemical Properties of a Rationally Designed Chiral C–N Palladacycle
作者:Jeanette See Leng Yap、Houguang Jeremy Chen、Yongxin Li、Sumod A. Pullarkat、Pak-Hing Leung
DOI:10.1021/om401044z
日期:2014.2.24
X-ray crystallography in the solid state and by 1H–1H rotating frame Overhauser effect (ROESY) NMR spectroscopy in solution. An evaluation of the sterically hindered resolved cyclopalladated units as chiral auxiliaries was conducted in the endo-cycloaddition reaction between 3,4-dimethyl-1-phenylphosphole (DMPP) and ethyl vinyl ketone. The two expected phosphanorbornene adducts were generated with moderate
一种新的外消旋的叔胺,1-(2,5-二异丙基苯基) - ñ,Ñ -dimethylethanamine,由2,5- diisopropylbenzaldehyde通过在高的总收率的多步骤方法合成。发现该配体的邻位palpalation对反应条件和所使用的palpalating试剂敏感。因此,金属络合过程可产生高产率,引线的环钯络合物意外N-去甲基化胺钯(II)配合物,或两者。两种产物均已分离,并在固态结晶和在溶液中通过光谱表征。环钯络合物外消旋可以通过(的形成被有效地解决小号)-prolinato衍生物。所述非对映体解决复合物的立体化学绝对通过单晶X射线晶体在固态确定,由1 H- 1 H ^旋转框架Overhauser效应(ROESY)NMR光谱在溶液中。在3,4-二甲基-1-苯基磷脂(DMPP)和乙基乙烯基酮之间的内环加成反应中,对作为手性助剂的位阻拆分的环状palpalladated单