An Efficient and Green Synthesis of Flavones Using Natural Organic Acids as Promoter Under Solvent-free Condition
作者:Nitin M. Thorat、Santosh R. Kote、Shankar R. Thopate
DOI:10.2174/157017861108140613163214
日期:2014.6
An efficient and eco-friendly synthesis of flavones, promoted by naturallyoccurring acids, via cyclodehydration of 1-(2-hydroxyphenyl)-3-aryl-1,3-propanediones using conventional and microwave heating under solvent-free condition is described.
A simple methodology has been developed for the synthesis of o-phenolic-l,4-diketones from the o-phenolicl,
3-diketones. The reaction performed in the presence of organozinc reagents under mild conditions afforded the products
l,4-diketones in moderate yields.
PPh3-catalyzed unexpected α-addition reaction of 1-(o-hydroxyaryl)-1,3-diketones to terminal alkynoates: a straightforward synthesis of multifunctional vinylesters
PPh3-catalyzed α-addition reactions of 1-(o-hydroxyaryl)-1,3-diketones to terminal alkynoates involving carbonâcarbon bond cleavage to give multifunctional vinylesters are described.
Synthesis of functionalized chromones via organocatalysis
作者:Sai-Shuai Wen、Jing Wang、Yi-Ming Luo、Hua Yang
DOI:10.1016/j.tet.2014.10.045
日期:2014.12
A facile and versatile organocatalytic approach to access 2-substituted and 2,3-disubstituted chromone derivatives under mild conditions was developed, which was effectively catalyzed by novel proline phenylsulphonylhydrazide or pyrrolidine. As a result, diversely functionalized chromones were obtained in up to 99% yield. In addition, further modification of the corresponding chromones afforded novel polycyclic chromones. (C) 2014 Elsevier Ltd. All rights reserved.
Thorat, Nitin M.; Dengale, Rohit A.; Thopate, Shankar R., Letters in Organic Chemistry, 2015, vol. 12, # 8, p. 574 - 583
作者:Thorat, Nitin M.、Dengale, Rohit A.、Thopate, Shankar R.、Rohokale, Sandeep V.