<i>anti</i>-Selective synthesis of β-boryl-α-amino acid derivatives by Cu-catalysed borylamination of α,β-unsaturated esters
作者:Soshi Nishino、Yuji Nishii、Koji Hirano
DOI:10.1039/d2sc06003e
日期:——
borylamination of α,β-unsaturated esters with B2pin2 and hydroxylamines has been developed to deliver acyclic β-boryl-α-amino acid derivatives with high anti-diastereoselectivity (up to >99 : 1), which is difficult to obtain by the established methods. A chiral phosphoramidite ligand also successfully induces the enantioselectivity, giving the optically active β-borylated α-amino acids. The products can be stereospecifically
已开发出铜催化的 α,β-不饱和酯与 B 2 pin 2和羟胺的区域选择性和非对映选择性硼胺化,以提供具有高抗非对映选择性(高达 >99 : 1)的无环 β-硼基-α-氨基酸衍生物),用现有的方法很难得到。手性亚磷酰胺配体也成功地诱导了对映选择性,产生光学活性的β-硼化α-氨基酸。该产品可以立体定向地转化为β-功能化的α-氨基酸,这在药物化学领域具有重要意义。