Cyclopropenation of internal alkynylsilanes and diazoacetates catalyzed by copper(<scp>i</scp>) N-heterocyclic carbene complexes
作者:Thomas J. Thomas、Benjamin A. Merritt、Betsegaw E. Lemma、Adina M. McKoy、Tri Nguyen、Andrew K. Swenson、Jeffrey L. Mills、Michael G. Coleman
DOI:10.1039/c5ob02259b
日期:——
Copper(I) N-heterocycliccarbene (CuNHC) complexes are more catalytically active than traditional transition metal salts for the cyclopropenation of internal alkynylsilanes and diazoacetate compounds. A series of 1,2,3-trisubstituted and 1,2,3,3-tetrasubstituted cyclopropenylsilane compounds were isolated in good overall yields. An interesting regioselective and chemodivergent reaction pathway was
Live-cell imaging and profiling of c-Jun N-terminal kinases using covalent inhibitor-derived probes
作者:Linghui Qian、Sijun Pan、Jun-Seok Lee、Jingyan Ge、Lin Li、Shao Q. Yao
DOI:10.1039/c8cc09558b
日期:——
Bioorthogonal probes which feature covalent labelling, and the corresponding two-photon fluorogenic reporters, are used to profile and image cellular JNKs.
生物正交探针具有共价标记特性,配套的双光子荧光报告物被用于对细胞JNK进行分析和成像。
Functionalized Cyclopropenes As Bioorthogonal Chemical Reporters
作者:David M. Patterson、Lidia A. Nazarova、Bryan Xie、David N. Kamber、Jennifer A. Prescher
DOI:10.1021/ja3060436
日期:2012.11.14
Chemicalreporters are unique functional groups that can be used to label biomolecules in living systems. Only a handful of broadly applicable reporters have been identified to date, owing to the rigorous demands placed on these functional groups in biological settings. We describe here a new chemical reporter-cyclopropene-that can be used to target biomolecules in vitro and in live cells. A variety
Diastereoselective Intermolecular Pauson−Khand Reactions of Chiral Cyclopropenes
作者:Mahesh K. Pallerla、Joseph M. Fox
DOI:10.1021/ol051456u
日期:2005.8.1
can increase the scope and utility of intermolecularPauson-Khandreactions. The well-defined chiral environment of cyclopropenes has a powerful influence on the diastereoselectivity of the reactions and leads to the production of a single cyclopentenone in each of the described cases. The cyclopropane ring strongly influences the stereochemistry of reactions at the enone, and the three-membered ring
Strain-Promoted Cycloaddition of Cyclopropenes with <i>o</i>
-Quinones: A Rapid Click Reaction
作者:Digvijay Gahtory、Rickdeb Sen、Andriy R. Kuzmyn、Jorge Escorihuela、Han Zuilhof
DOI:10.1002/anie.201800937
日期:2018.8.6
Novel click reactions are of continued interest in fields as diverse as bio‐conjugation, polymer science and surface chemistry. Qualification as a proper “click” reaction requires stringent criteria, including fast kinetics and high conversion, to be met. Herein, we report a novel strain‐promoted cycloaddition between cyclopropenes and o‐quinones in solution and on a surface. We demonstrate the “click