Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409-1061, USA.
Chem Commun (Camb). 2010 Jun 28;46(24):4330-2. doi: 10.1039/c0cc00287a. Epub 2010 May 12.
The asymmetric catalytic Strecker reaction of achiral N-phosphonyl imines with Et(2)AlCN has been established. Both free amino alcohols and BINOLs have been proven to be effective catalysts to afford excellent enantioselectivities and yields. The N-phosphonyl group can be readily cleaved under mild conditions and enable purification of crude products by simple washing with hexane. The cleaved N,N-dialkyl diamine auxiliary can be recovered quantitatively via n-BuOH extraction. The scope for both N-phosphonyl imines and catalysts was vastly studied for this new catalytic system.
手性 N-膦酰亚胺与 Et(2)AlCN 的不对称催化Strecker 反应已经建立。游离氨基醇和联萘酚都被证明是有效的催化剂,可以获得优异的对映选择性和产率。N-膦酰基在温和条件下容易裂解,并能通过简单地用己烷洗涤来纯化粗产物。裂解的 N,N-二烷基二胺助剂可以通过正丁醇萃取定量回收。这个新催化体系对 N-膦酰亚胺和催化剂的适用范围进行了广泛的研究。