Site-Selective Cu-Catalyzed Alkylation of α-Amino Acids and Peptides toward the Assembly of Quaternary Centers
作者:Marcos San Segundo、Arkaitz Correa
DOI:10.1002/cssc.201802216
日期:2018.11.23
The CuI‐catalyzed selective α‐alkylation of α‐amino acid and peptide derivatives with 2‐alkyl‐1,3‐dioxolanes is reported. This oxidative coupling is distinguished by its site‐specificity, high diastereoselectivity, and chirality preservation and exhibits absolute chemoselectivity for N‐aryl glycine motifs over other amino acid units. Collectively, the method allows for the assembly of challenging quaternary
Substituted [[4-[4-(4-phenyl-1-piperazinyl)phenoxymethyl]-1,3 dioxolan-2-yl]methyl]-1H-imidazoles and 1H-1,2,4-triazoles having antimicrobial properties and being particularly useful in the treatment of vaginal candidosis.
Substituted [[4-[4-(4-phenyl-1-piperazinyl)phenoxymethyl]-1,3-dioxolan-2-yl]methyl]-1H -imidazoles and 1H-1,2,4-triazoles having antimicrobial properties and being particularly useful in the treatment of vaginal candidosis.
Metal‐Free Electrochemical [3+2] Cycloaddition between <i>α</i>‐Amino Carbonyls and Tosylmethyl Isocyanide <i>en route</i> to Substituted Imidazoles
作者:Samrat Mallick、Mrinmay Baidya、Suman De Sarkar
DOI:10.1002/adsc.202301071
日期:2024.1.30
essential requirement of transition metal catalysts and chemical oxidants. A wide variety of different functionalities are well tolerated under this reaction condition, contributing to the substrate scope and applicability. Several control experiments and cyclic voltammetry studies suggest an electro-oxidation triggered successive C−C and C−Nbondformations followed by rapid aromatization for constructing