The Ugi reaction with 2-substituted cyclic imines. Synthesis of substituted proline and homoproline derivatives
作者:Valentine G. Nenajdenko、Anton V. Gulevich、Elizabeth S. Balenkova
DOI:10.1016/j.tet.2006.04.021
日期:2006.6
The Ugi three-component reaction with 2-substituted five-, six-, and seven-membered cyclic imines was investigated. The reaction opens a newroute to substituted proline and homoproline derivatives. It was shown that the method is efficient for the one-step preparation of seminatural dipeptides containing natural amino acid residues, and fragments of substituted proline or pipecolinic acid. The scope
From Cyclic Ketimines to α‐Substituted Cyclic Amino Acids and their Derivatives: Influence of Ring Size and Substituents on Stability and Reactivity of Cyclic Aminonitriles
作者:Natalia G. Voznesenskaia、Olga. I. Shmatova、Anna A. Sosnova、Valentine G. Nenajdenko
DOI:10.1002/ejoc.201801087
日期:2019.1.31
A general route to alpha‐substituted cyclic amino acids was elaborated. The approach is based on Strecker reaction with cyclic ketimines. The series of 5–7 membered amino nitriles having different substituents were prepared. Synthesis of alpha‐substituted prolines and their amides was elaborated starting from the corresponding 5‐membered ketimines
Synthesis of azacycloalkane-1,2-fused pyrroles via alkylation of cyclic ketimines with α-bromo ketones
作者:Olga I. Shmatova、Valentine G. Nenajdenko
DOI:10.1016/j.mencom.2018.05.013
日期:2018.5
The reaction of 2-alkyl-substituted 5-, 6- and 7-membered cyclic imines with alpha-bromo ketones in the presence of Hunig's base affords 2,3-dihydro-1H-pyrrolizines, 5,6,7,8-tetrahydroindolizines and 6,7,8,9-tetrahydro-5H-pyrrolo[1,2-alpha]azepines, respectively.