20280-86-8Relevant articles and documents
Visible-Light-Induced Regioselective Deaminative Alkylation of Coumarins via Photoredox Catalysis
Tao, Maoling,Wang, An-Jun,Guo, Peng,Li, Weipiao,Zhao, Liang,Tong, Jie,Wang, Haoyang,Yu, Yanbo,He, Chun-Yang
, p. 24 - 29 (2021/10/19)
3-Alkylated coumarins have many applications in medicinal chemistry, however, methods access to such structures are still limited. Herein, we report a site-selective photocatalytic deaminative alkylation of coumarins utilizing pyridinium-activated aliphatic primary amines as alkylation reagents. The protocol was highlighted by its mild reaction conditions, operational simplicity, and broad functional group compatibility. Moreover, this strategy enables late-stage modification of some pharmaceuticals and natural products, thus providing an appealing approach to valuable molecules in medicinal chemistry. (Figure presented.).
Oxo-Rhenium-Catalyzed Radical Addition of Benzylic Alcohols to Olefins
Bandari, Chandrasekhar,Nicholas, Kenneth M.
, p. 3320 - 3327 (2020/03/23)
Although carbon radicals generated from a variety of alcohol derivatives have proven valuable in coupling and addition reactions, the direct use of alcohols as synthetically useful radical sources is less known. In this report, benzylic alcohols are shown to be effective radical precursors for addition reactions to alkenes when treated with triphenylphosphine or piperidine with the catalyst ReIO2(PPh3)2 (I).
Oxidant controlled regioselective mono- and di-functionalization reactions of coumarins
Banerjee, Arghya,Santra, Sourav Kumar,Khatun, Nilufa,Ali, Wajid,Patel, Bhisma K.
, p. 15422 - 15425 (2015/10/20)
C-3 alkylation of coumarins has been accomplished using cycloalkanes or alkylbenzenes in the presence of di-tert-butylperoxide (DTBP) and FeIII catalyst. Under metal free conditions and just by switching the oxidant from DTBP to TBHP, an exclus
