开发了一种温和的Rh催化方法,通过还原1-芳基吲唑酮和2-芳基-[4 + 2]环合反应,合成羟基亚氨基官能化的吲唑并[1,2- a ] cinnolines和邻苯并[2,3- a ] cinnolines。 2,3-二氢酞嗪-1,4-二酮与各种硝基烯烃。在无还原剂的条件下,通过连续的C–H活化/烯烃插入/还原反应,合成了目标肟肟修饰的四环稠合肉桂醛。
Expedient synthesis of new cinnoline diones by Ru-catalyzed regioselective unexpected deoxygenation-oxidative annulation of propargyl alcohols with phthalazinones and pyridazinones
作者:Subramani Rajkumar、S. Antony Savarimuthu、Rajendran Senthil Kumaran、C. M. Nagaraja、Thirumanavelan Gandhi
DOI:10.1039/c5cc09347c
日期:——
Ruthenium-catalyzed simple, cascade and one-pot synthesis of cinnoline-fused diones has been carried out by the C–H activation of phthalazinones/pyridazinones.
钌催化的简单、级联和一锅法合成了咖啉并环化二酮,通过对邻苯二酮/吡啶并咪唑酮的C-H活化。
Additive-Driven Rhodium-Catalyzed [4+1]/[4+2] Annulations of <i>N</i>-Arylphthalazine-1,4-dione with α-Diazo Carbonyl Compounds
作者:Pidiyara Karishma、Chikkagundagal K. Mahesha、Devesh S. Agarwal、Sanjay K. Mandal、Rajeev Sakhuja
DOI:10.1021/acs.joc.8b01630
日期:2018.10.5
A Rh(III)-catalyzed strategy involving the [4+1] annulation of 2-arylphthalazine-1,4-diones with α-diazo carbonyl compounds was developed, accessing a series of unprecedented hydroxy-dihydroindazolo-fused phthalazines in good to excellent yields. By varying the additive, phthalazino-fused cinnolines were synthesized under Rh-catalyzed conditions via [4+2] annulation between the same starting materials
Assembly of the Hydroxycinnoline Core via Hydrazide-Assisted Rh(III)-Catalyzed C–H Functionalization and Annulation
作者:Suho Kim、Heon Kyu Park、Neeraj Kumar Mishra、In Su Kim、Ju Young Kang
DOI:10.1055/a-1811-7948
日期:2022.10
indazolones has emerged as a pivotal topic in catalytic C–H functionalization events. Herein we report the hydrazide-assisted rhodium(III)-catalyzed cross-coupling reactions of N-arylphthalazinones and N-arylindazolones with vinylene carbonate. This method provides directaccess to tetracyclic hydroxycinnolines. Complete site-selectivity and functional group compatibility were observed.