我们的研究开发了一种不同的合成方法,用于使用邻炔基芳基酮作为常见前体合成 3,4-二氢-2 H -苯并[ h ]色烯-2-酮3和芴酮9衍生物。 3,4-二氢-2H-苯并[ h ]苯并-2-酮3的合成采用银催化酮化反应生成多羰基中间体,再经过分子内双环化和脱羧一锅生成内酯和苯环时尚。此外,相同的前体可用于在酸性条件下制备芴酮衍生物9 。该反应通过形成茚酮类似物、随后生成对醌甲基化物中间体和分子内环化来进行,以良好的产率提供相应的产物。
A dominoprocess that converges the migratory insertion of carbene with a Heckreaction has been established as a versatile tool for the synthesis of 2-arylidene-3-aryl-1-indanones from very stable and easily accessible N-tosylhydrazones and 2′-iodochalcones. The reaction selectively proceeds through 5-exo-trig cyclization and delivers the products selectively with the E configuration of the double
[EN] COMPOSITION FOR TREATING DIABETES AND METABOLIC DISEASES AND A PREPARATION METHOD THEREOF<br/>[FR] COMPOSITION POUR LE TRAITEMENT DU DIABÈTE ET DE MALADIES MÉTABOLIQUES, ET SON PROCÉDÉ DE PRÉPARATION
申请人:UNIV KAOHSIUNG MEDICAL
公开号:WO2013022951A1
公开(公告)日:2013-02-14
Disclosed is a chalcone composition for treating diabetes and metabolic syndromes. In particular, the chalcone compound bound with 2-halogen in ring A significantly decreases the blood glucose level in the in vitro anti-diabetic effect experiment. In the in vivo animal model, the leading chalcone compound can prevent the progression of diabetes and control the blood glucose level, and there is no significant difference in the gains in body weight. Throughout the seven-week administration, there are no hepatic or renal toxicity observed.
A novel copper-catalyzed sulfurdioxideanion incorporation cascade for the synthesis of 1-thiaflavanone sulfones has been disclosed using rongalite as an economic and safe sulfone source. A series of 1-thiaflavanone sulfones were synthesized from easily prepared 2′-iodochalcone derivatives in excellent yields. This transformation proceeds through consecutive formation of two C–S bonds, which is the
process for the formation of diethyl 2-aryl-3,4-dihydro-4-oxo-1,1(2H)-naphthalenedicarboxylate is described by using a combination of Michael addition and copper-catalyzed α-arylation of malonicacidderivatives. The protocol worked well for a variety of 1-(2-iodoaryl)enones and displayed great functional group compatibility. Michael addition - copper - catalysis - cascade reactions- α-arylation
Domino Synthesis of Thioflavones and Thioflavothiones by Regioselective Ring Opening of Donor–Acceptor Cyclopropane Using In-Situ-Generated Thiolate Anions
作者:Nallappan Sundaravelu、Govindasamy Sekar
DOI:10.1021/acs.orglett.9b02210
日期:2019.9.6
A copper-catalyzed intramolecular ring opening of donor-acceptor cyclopropane is developed for the synthesis of 3-alkyl-carbonated thioflavones and further extended to 3-alkyl-carbonated thioflavothione, using xanthate as a sulfur surrogate. This reaction proceeds through thiolate formation/ring opening/Krapcho decarboxylation, followed by hydrogen abstraction, to give thioflavanone, which is further