In Situ Generation of Oxazole Ylide and Interception with Sulfonamide: Construction of Amidines Using Two Diazo Molecules
作者:Jijun Chen、Wenhao Long、Yanwei Zhao、Haiyan Li、Yonggao Zheng、Pengcheng Lian、Xiaobing Wan
DOI:10.1002/cjoc.201800208
日期:2018.9
A novel generation of oxazoleylide and interception with sulfonamide have been well developed to construct fully substituted amidines. This copper‐catalyzed four‐component reaction incorporates twodiazomolecules to target amidines and shows broad substrate scope, excellent functional groups tolerance and good to excellent yields.
Silver-Catalyzed Cross-Olefination of Donor and Acceptor Diazo Compounds: Use of<i>N</i>-Nosylhydrazones as Diazo Surrogate
作者:Zhaohong Liu、Binbin Liu、Xue-Feng Zhao、Yan-Bo Wu、Xihe Bi
DOI:10.1002/ejoc.201601610
日期:2017.1.26
The cross-olefination reaction of donor and acceptor diazocompounds is reported. The use of N-nosylhydrazones as the diazo surrogates and the dependence on silver catalysis are crucial for the reaction development. A variety of (hetero)aryl N-nosylhydrazones and α-diazo esters, amides, and phosphonates were compatible, affording functionalized alkenes in good-to-high yields with moderate Z/E selectivity
A novel [3 + 2] cycloaddition between nitrile ylides and diazonium salts was well-established. This copper-catalyzed three-component reaction was distinguished by mild conditions, ready availability, and operational simplicity, thus opening access to 1,2,4-triazoles with a diverse set of substitution patterns.
Enantioselective Multifunctionalization with Rh Carbynoids
作者:Yu Qian、Jie Tang、Xiaoyu Zhou、Jian Luo、Xiaoyan Yang、Zhuofeng Ke、Wenhao Hu
DOI:10.1021/jacs.3c10460
日期:2023.12.6
Multifunctionalization from the interception of active intermediates is an attractive synthetic strategy for the efficient construction of complex molecular scaffolds in an atom and step economic fashion. However, the design of reactions involving metal carbynoids that exhibit carbene/carbocation behavior is currently limited, and developing catalyst-controlled highly enantioselective versions poses significant