Potassium–Tertiary Butoxide–Assisted Addition of Thioglicolic Acid to Chalcone Derivatives Under Solvent-Free Conditions
摘要:
A series of chalcone derivatives containing thioglicolic acid (4a-j) was prepared by addition of thioglicolic acid to the chalcones (3a-j) in the presence of KOt-Bu under solvent-free conditions. The mechanistic pathway of the reaction can be explained by the Michael-type addition of thioglicolic acid to chalcone derivatives (3a-j).
Furan oxidation by Mn(<scp>iii</scp>)/Co(<scp>ii</scp>) catalysts – application to benzofuran synthesis
作者:Tingshu Wang、Miao Zhang、Yifan Zheng、Junmo Seong、Myoung Soo Lah、Sangho Koo
DOI:10.1039/d1ra05305a
日期:——
containing a β-ketoester group at 2-position undergo oxidative ring-opening by Mn(III)/Co(II) catalysts under an O2 atmosphere to produce 1,4-dicarbonyl moieties through an endoperoxide intermediate, which consecutively cyclized with the β-ketoester unit to afford 4-hydroxy-2-cyclohexen-1-ones. This oxidation/cyclization products were efficiently transformed into versatile benzofuran derivatives after consecutive
2位含有β-酮酯基的呋喃在O 2气氛下,通过Mn( III )/Co( II )催化剂进行氧化开环,通过内过氧化物中间体生成1,4-二羰基部分,并依次与β-酮酯单元得到4-羟基-2-环己烯-1-酮。经过连续芳构化和Paal-Knorr反应后,该氧化/环化产物被有效地转化为多功能苯并呋喃衍生物。
Iodine-Catalyzed Addition of Methyl Thioglycolate to Chalcones
A series of novel beta-mercapto carbonyl compounds (3a-z), methyl 2-(3-oxo-1,3-diarylpropylthio)acetate, were synthesized and characterized via iodine-catalyzed addition of methyl thioglycolate to chalcones (1a-z).