CuI / 4-羟基-1-脯氨酸催化的芳基溴化物与N- Boc肼的偶合反应在DMSO中于80°C进行,得到N-芳基酰肼。当使用芳基碘化物时,该反应在50℃下完成并且不需要配体。在CuI / 4-羟基-1-脯氨酸的催化下,氨水与芳基溴化物的偶联反应在50℃下顺利进行,得到伯芳基胺。在这种情况下,发现K 2 CO 3是比Cs 2 CO 3更好的碱。这些过程允许组装N带有多种官能团的-芳基酰肼和伯芳基胺包括羟基,胺基,三氟甲基,酯基,硝基和酮。
Tandem hydroformylation–hydrazone formation–Fischer indole synthesis: a novel approach to tryptamides
作者:Axel M. Schmidt、Peter Eilbracht
DOI:10.1039/b503396a
日期:——
A novelone-potsynthesis of indole systems via tandem hydroformylation-hydrazone formation-Fischer indolization starting from allylic amides and aryl hydrazines is described. This tandem procedure directly leads to biologically interesting tryptamides and analogues.
Expedient synthesis of indoles from N-Boc arylhydrazines
作者:Young-Kwan Lim、Cheon-Gyu Cho
DOI:10.1016/j.tetlet.2004.01.011
日期:2004.2
The readily available N-Boc arylhydrazines undergo efficient Fischer cyclizations to provide the indoles in good yields, when reacted with enolizable ketones.
Starazo triple switches – synthesis of unsymmetrical 1,3,5-tris(arylazo)benzenes
作者:Andreas H Heindl、Hermann A Wegner
DOI:10.3762/bjoc.16.4
日期:——
the other based on Pd-catalyzedcoupling reactions of arylhydrazides and arylhalides, followed by oxidation, were investigated. The Pd-catalyzed route efficiently led to the target compounds, unsymmetrical tris(arylazo)benzenes. These triple switches were preliminarily characterized in terms of their isomerization behavior using UV-vis and 1H NMR spectroscopy. The efficient synthesis of this new class
One-Pot Synthesis of Indoles and Pyrazoles via Pd-Catalyzed Couplings/Cyclizations Enabled by Aqueous Micellar Catalysis
作者:Evan B. Landstrom、Nnamdi Akporji、Nicholas R. Lee、Christopher M. Gabriel、Felipe C. Braga、Bruce H. Lipshutz
DOI:10.1021/acs.orglett.0c02315
日期:2020.8.21
aminations followed by subsequent cyclizations facilitated by aqueous micellar catalysis. This new technology includes efficient couplings with low loadings of palladium, a more stable source of the required hydrazine moiety, greater atom economy for the initial coupling, and reduced reaction temperatures, all leading to environmentally responsible processes.
Ag+ mediated deaminations of N-Boc aryl hydrazines for the efficient synthesis of N-Boc aryl amines
作者:Kang-Sang Lee、Young-Kwan Lim、Cheon-Gyu Cho
DOI:10.1016/s0040-4039(02)01800-2
日期:2002.10
N-Boc-aryl hydrazines were converted into N-Boc-aryl amines under the action of Ag+. Its mild reaction conditions tolerate the presence of a variety of functional groups.