Mechanochemical Solvent-Free Synthesis of Indenones from Aromatic Carboxylic Acids and Alkynes
作者:Liang Li、Guan-Wu Wang
DOI:10.1021/acs.joc.1c01472
日期:2021.10.15
solvent-free synthesis of indenones from aromatic carboxylicacids and alkynes was achieved through triflic anhydride (Tf2O)-induced cyclization reaction. A variety of indenones including a bioactive PPARγ agonist were obtained in up to 90% yield at room temperature. The present protocol has the advantages of mild reaction conditions, high reaction efficiency, and feasibility of scalable synthesis, providing
An efficient protocol for the synthesis of indenones has been developed from the annulation of benzoic esters and internal alkynes by exploiting cobalt catalyst.
通过利用钴催化剂,通过苯甲酸酯和内部炔烃的环化,已经开发出一种有效的合成茚满的方案。
Divergent Synthesis of α-Aroyloxy Ketones and Indenones: A Controlled Domino Radical Reaction for Di- and Trifunctionalization of Alkynes
Three differentmodes of aldehyde/alkyne assembly through a controlled radical reaction are devised. While a double C–H activation/annulation leads to indenones, a concurrent oxidation of both aldehydes and alkynes in the course of their connection offers aroyloxy ketones. Besides two types of cascadereactions starting from identical materials, through a phenylpropiolic acid substrate, a cascade three
Thermal and photochemical reactions of η<sup>5</sup>-cyclopentadienyl(naphthoyl)(dicarbonyl)iron complexes with alkynes: formation of benzindenones and dihydropentalenones
作者:Ian R. Butler、Jean-Pierre Charland、Joanne L. Elliot、Jean Houde、W. Edward Lindsell、Kevin J. McCullough、Peter N. Preston、Alan B. Rettie
DOI:10.1039/p19900002799
日期:——
η5-Cyclopentadienyl(1- and 2-naphthoyl)(dicarbonyl)iron complexes (6a) and (6b) have been synthesised from the appropriate acid chlorides and sodium η5-cyclopentadienyl(dicarbonyl)iron-(1–). UV irradiation of (6a) and (6b) separately with diphenylacetylene in benzene gives 1,2-diphenyl-3H-benz[e]inden-3-one (8), and 2,3-diphenyl-1H-benz[e]inden-1-one (7) respectively, together with smaller quantities
η 5 -环戊二烯基(1-和2-萘甲酰基)(二羰基)铁配合物(图6A)和(6B)已经被从适当的酰基氯和钠η合成5 -环戊二烯基(二羰基)铁(1-)。用苯中的二苯乙炔分别对(6a)和(6b)进行紫外线照射,得到1,2-二苯基-3 H-苯并[ e ]茚满-3-一(8)和2,3-二苯基-1 H-苯并[ ë ]茚-1-酮(7)分别与较少量的双(η一起5 -环戊二烯基)(四羰基)二铁。苯并[ e ]茚满(7)和(8)也形成在从二苯基乙炔低收率和η 5 -环戊二烯基(1-和2-萘甲酰基)(二羰基)铁配合物分别在热十氢化萘。从热反应的第二产物是Ç -4,Ç -6一个-二氢-4-(1-或2-萘基)-2,3- diphenylpentalen-1([R -3a ħ) -酮(9A)或(9b)分别结合有环戊二烯基。最后一种类型(中的化合物,9C也形成在η的热反应)5 -环戊二烯基(1-萘甲酰基)(二羰基)铁与1-
Dehydration of 3- and 4-aryl- substituted 3-hydroxy acids in acetic anhydride in presence of zinc chloride
作者:Ch.P. Ivanov、D.M. Mondeshka
DOI:10.1016/0040-4020(73)80122-x
日期:1973.1
The reaction of several di- and triaryl-substituted 3-aryl-3-hydroxy acids and a 4-aryl-3-hydroxy acid in aceticanhydride in the presence of anhydrous zinc chloride has been investigated. It has been shown that the reaction discovered with 3-(2′-thienyl)-substituted 3-hydroxy acids, namely, their conversion under the above stated conditions into α, β-unsaturated methyl ketones,1,2 occurs also with