A new bio-inspired approach is reported for amide and peptide synthesis using α-amino esters that possess a potential activating group (PAG) at the ester residue. To activate the ester functionality under mild metal-free conditions, we exploited the facile dearomatization of phenols with hypervalent iodine(III) reagents. Using a pyridine–hydrogen fluoride complex, highly reactive acyl fluoride intermediates
Composition and method for dyeing dye-susceptible material
申请人:Wella Aktiengesellschaft
公开号:EP1348700A3
公开(公告)日:2004-01-14
Composition for colouring dye-susceptible material (preferably keratinous material), containing at least one pro-dye (especially a glutaramide) and at least one enzyme capable of reacting, cleaving, or modifying the enzymatically-labile functionality in the pro-dye to form a dye substance or a direct dye; as well as a 2-component-kit.