Diastereo- and Enantioselective Catalytic Vinylogous Mukaiyama-Mannich Reactions of Pyrrole-Based Silyl Dienolates with Alkyl-Substituted Aldehydes
作者:Beatrice Ranieri、Claudio Curti、Lucia Battistini、Andrea Sartori、Luigi Pinna、Giovanni Casiraghi、Franca Zanardi
DOI:10.1021/jo201875a
日期:2011.12.16
A reliable, catalytic asymmetric vinylogous Mukaiyama–Mannich reaction of pyrrole-based silyl dienolates is introduced that is particularly apt for alkyl- and α-alkoxyalkyl-substituted aldehydes. The reaction course is effectively orchestrated by the Hoveyda–Snapper amino acid-based chiral ligand/silver(I) catalyst combination to produce valuable vicinal diamino carbonyl compounds in high yields, with
引入了一种可靠的,催化的不对称乙烯基吡咯基甲硅烷基二烯酸酯的Mukaiyama-Mannich反应,特别适用于烷基和α-烷氧基烷基取代的醛。Hoveyda-Snapper氨基酸基手性配体/银(I)催化剂组合有效地策划了反应过程,以高收率生产有价值的邻位二氨基羰基化合物,并且具有几乎完全的γ-位和反选择性以及显着的催化剂-到产品手性转移。曼尼希产品的实用性可以在前所未有的全氢呋喃[3,2- b ]吡咯烷酮产品的合成中看到,全氢呋喃并[3,2- b ]吡咯烷酮产品是天然存在的(+)-goniofufurone的氮杂类似物。