Asymmetric synthesis of α,β-diamino acid derivatives with an aziridine-, azetidine- and γ-lactone-skeleton via Mannich-type additions across α-chloro-N-sulfinylimines
作者:Gert Callebaut、Sven Mangelinckx、Loránd Kiss、Reijo Sillanpää、Ferenc Fülöp、Norbert De Kimpe
DOI:10.1039/c2ob06637h
日期:——
The efficient asymmetric synthesis of new chiral γ-chloro-α,β-diamino acid derivatives via highly diastereoselective Mannich-type reactions of N-(diphenylmethylene) glycine esters across a chiral α-chloro-N-p-toluenesulfinylimine was developed. The influence of the base, LDA or LiHMDS, used for the formation of the glycine enolates, was of great importance for the anti-/syn-diastereoselectivity of
通过N-(二苯基亚甲基)甘氨酸酯在手性α-氯-Np-甲苯磺酰亚胺基上的非对映选择性曼尼希型反应,有效地不对称合成新的手性γ-氯-α,β-二氨基酸衍生物。基,LDA或将LiHMDS,用于甘氨酸烯醇化物的形成的影响,是非常重要的用于反- /顺式的曼尼期型反应的-diastereoselectivity。事实证明,γ-氯代-α,β-二氨基酸衍生物是环向光学纯的抗-和顺式-β,γ-叠氮基-α-氨基酯闭环以及随后的环转化为反式的极好的基石。-3-氨基氮杂环丁烷-2-羧酸衍生物和α,β-二氨基-γ-丁内酯。