Selective Synthesis of Carbamate Protected Polyamines Using Alkyl Phenyl Carbonates
作者:Jørn Bolstad Christensen、Michael Pittelkow、Rasmus Lewinsky
DOI:10.1055/s-2002-34859
日期:——
Utilising alkyl phenyl carbonates, an economical, practical and versatile method for selective Boc, Cbz and Alloc protection of polyamines has been developed. This method allows Boc, Cbz and Alloc protection of primary amines in the presence of secondary amines by reaction of the polyamines with the alkyl phenyl carbonates. Also, this method allows mono carbamate protection of simple symmetrical aliphatic α,Ï-alkanediamines in high yields with respect to the diamine. Finally, the method allows selective carbamate protection of a primary amine located on a primary carbon in the presence of a primary amine located on a secondary or a tertiary carbon in excellent yields.
利用烷基苯基碳酸盐,我们开发出了一种对多胺进行选择性 Boc、Cbz 和 Alloc 保护的经济、实用和多用途方法。这种方法可通过多胺与烷基苯基碳酸盐的反应,在仲胺存在的情况下对伯胺进行 Boc、Cbz 和 Alloc 保护。 此外,该方法还能对简单对称的脂肪族δ,Ï-烷二胺进行单氨基甲酸酯保护,相对于二胺而言,产率较高。最后,该方法还可以在位于二级或三级碳上的伯胺存在的情况下,对位于一级碳上的伯胺进行选择性氨基甲酸酯保护,且收率极高。