Convenient Synthesis of Highly Functionalized Pyrazolines via Mild, Photoactivated 1,3-Dipolar Cycloaddition
作者:Yizhong Wang、Claudia I. Rivera Vera、Qing Lin
DOI:10.1021/ol7017328
日期:2007.10.1
cycloaddition procedure was successfully developed for the synthesis of polysubstituted pyrazolines. This procedure involved the in situ generation of the reactive nitrile imine dipoles using a hand-held UV lamp at 302 nm, followed by spontaneous cycloaddition with a broad range of 1,3-dipolarophiles with excellent solvent compatibility, functional group tolerance, regioselectivity, and yield.
Triple Orthogonal Labeling of Glycans by Applying Photoclick Chemistry
作者:Verena F. Schart、Jessica Hassenrück、Anne-Katrin Späte、Jeremias E. G. A. Dold、Raphael Fahrner、Valentin Wittmann
DOI:10.1002/cbic.201800740
日期:2019.1.18
All good things come in threes: The nitrile imine–alkene cycloaddition (photoclick reaction) was shown to be a suitable ligation reaction for metabolic glycoengineering. In combination with an inverse‐electron‐demand Diels–Alder reaction and strain‐promoted azide–alkyne cycloaddition, triplelabeling of glycans was achieved for the first time.