bridged aromatic azo compounds (AAzos) from aromatic amines was developed by using red copper as catalyst. Despite numerous efforts towards the catalytic synthesis of symmetric and asymmetric AAzos derivatives, most reactions present certain drawbacks inhibiting their industrial applications, such as laborious multi-step processes, harsh reaction conditions and expensive reagents. And the synthesis
Cu(II)-catalyzed aerobic oxidative amidation of azoarenes with amides
作者:Gang Li、Xiaoting Chen、Xulu Lv、Chunqi Jia、Panpan Gao、Ya Wang、Suling Yang
DOI:10.1007/s11426-017-9175-2
日期:2018.6
dehydrogenative amidation of azoarene using air as the terminal oxidant was developed. Various amides, such as arylamides, alkylamides, lactams, and imides, are all effective amidation reagents and provide the desired products in moderate to excellent yields. Notably, good yields can also be obtained on a gram-scale with this amidation reaction. In this protocol of azoarene amidation, the catalyst (Cu(OAc)2)
Chemodivergent coupling of azoarenes with benzyl alcohols via borrowing hydrogen strategy using a well-defined nickel catalyst
作者:Sadhna Bansal、Rajesh G. Gonnade、Benudhar Punji
DOI:10.1039/d3cy00090g
日期:——
Chemodivergent (de)hydrogenativecoupling of azoarenes with benzylalcohols is achieved via the NN bond activation using an inexpensive and well-defined (6-OH-bpy)NiCl2 catalyst. This protocol highlights the construction of C–N bonds via a borrowinghydrogenstrategy that offers substituted imines and amines. A range of azo compounds couple with various substituted benzylalcohols in a tandem hydrogenation/dehydrogenation
使用廉价且定义明确的 (6-OH-bpy)NiCl 2催化剂通过NN键活化实现偶氮芳烃与苯甲醇的化学发散(脱)氢偶联。该协议强调了通过提供取代亚胺和胺的借氢策略构建 C-N 键。在串联氢化/脱氢过程中,一系列偶氮化合物与各种取代的苯甲醇偶联。镍催化剂连同 K 2 CO 3或 KO tBu 碱控制亚胺和胺形成的选择性。一项初步的机理研究确定了金属-配体合作 (MLC) 的关键作用,包括不同的自由基途径。