Rh(III)-Catalyzed Redox-Neutral Annulation of Primary Benzamides with Diazo Compounds: Approach to Isoquinolinones
作者:Youzhi Wu、Peng Sun、Kaifan Zhang、Tie Yang、Hequan Yao、Aijun Lin
DOI:10.1021/acs.joc.5b02824
日期:2016.3.4
Reported herein is a Rh-catalyzed redox-neutralannulation of primary benzamides with diazo compounds, representing an efficient and economic protocol to isoquinolinones. The procedure exhibited good functional group tolerability, scalability, and regioselectivity, obviating the need for oxidants, and only environmentally benign N2 and H2O were released. Further utilization of the method provided an
Iron-Catalyzed Annulation of 1,2-Diamines and Diazodicarbonyls for Diverse and Polyfunctionalized Quinoxalines, Pyrazines, and Benzoquinoxalines in Water
作者:Rameshwar Prasad Pandit、Sung Hong Kim、Yong Rok Lee
DOI:10.1002/adsc.201600503
日期:2016.11.17
construction of polyfunctionalized quinoxalines has been developed. The key strategy includes the one‐pot domino N−H insertion, cyclization, and oxidation reactions. This protocol offers a safe and mild synthetic approach to access a variety of quinoxalinederivatives in high yields. This methodology also allows the formation of biologically interesting pyrazines and benzoquinoxalines.
Construction of Multifunctionalized Azopyrazoles by Silver- Catalyzed Cascade Reaction of Diazo Compounds
作者:Rameshwar Prasad Pandit、Yong Rok Lee
DOI:10.1002/adsc.201500197
日期:2015.8.24
silver trifluoromethanesulfonate (AgOTf)‐catalyzed cascade reaction of α‐diazo‐β‐keto esters with two arylhydrazines or two arylhydrazine hydrochlorides. This cascade reaction included pyrazolone formation, NHinsertion, and oxidation. For the synthesis of more diverse azopyrazoles bearing two different aromatic rings, the silver(I)‐catalyzed cascade reaction of 4‐diazopyrazol‐3‐one with arylhydrazine
Copper(I) Bromide-Mediated Synthesis of Novel 2-Arylthiazole-5-carboxylates from α-Diazo-β-Keto Esters and Aromatic Thioamides
作者:Xavier Fontrodona、Santiago Díaz、Anthony Linden、José M. Villalgordo
DOI:10.1055/s-2001-17697
日期:——
aromatic primary thioamides 9 and 14, a simple synthesis of 2- aryl 4-substituted thiazole-5-carboxylate derivatives of type 10 and 16 has been accomplished. The method is based on the efficient ca- talysis of CuBr, which promotes the formation of the corresponding carbenoids 11 from diazo derivatives 8. These Cu-carbenoids 11 re- act with the thiocarbonyl group of the primary thioamides to afford presumably
申请人:Industry Academic Cooperation Foundation of Yeungnam University 영남대학교 산학협력단(220040363026) BRN ▼515-82-06574
公开号:KR20180003667A
公开(公告)日:2018-01-10
본 발명은 아조피라졸 화합물 및 은 촉매 반응을 이용한 이의 신규한 합성방법에 관한 것으로, 보다 상세하게는 α-디아조-β-케토에스터와 아릴하이드라진의 은 (Ag) 촉매 반응을 이용한 원-팟(one-pot) 합성방법은 다원적 기능을 갖는 다양한 아조피라졸을 효율적으로 합성할 수 있는 장점이 있으며, 상기 합성과정에 의해 합성된 아조피라졸은 천연물 합성, 의약제 또는 염료 산업 등에 널리 사용될 수 있다.