A General Cyclocarbonylation of Aryl Bromides and Triflates with Acetylenes: Palladium-Catalyzed Synthesis of 3-Alkylidenefuran-2-ones
作者:Xiao-Feng Wu、Basker Sundararaju、Pazhamalai Anbarasan、Helfried Neumann、Pierre H. Dixneuf、Matthias Beller
DOI:10.1002/chem.201101083
日期:2011.7.11
Making use of CO: An improved efficient synthesis of 5‐aryl‐3‐alkylidenefuran‐2‐ones has been developed (see scheme). Starting from readily available (hetero)arylbromides or aryltriflates and alkynes, furanones were produced in good yields through a double carbonylation process. To illustrate the generality of the method more than 25 furanone derivatives were synthesized, including the permethylated
Palladium-Catalyzed Carbonylative Coupling of Aryl Iodides and Benzyl Acetylenes to 3-Alkylidenefuran-2-ones under Mild Conditions and Its Density Functional Theory Modeling
A general and efficient method for the palladium‐catalyzed carbonylativecoupling of aryliodides to benzylacetylenes has been developed. Various furanones have been prepared in excellent yields from their corresponding benzylacetylenes at room temperature under a CO atmosphere. For aliphatic alkynes, their corresponding alkynones were obtained in good yields. Detailed DFT calculations have also
Benzyltriazoles have been catalytically oxidized by using CuI and tert-butyl hydroperoxide to yield phenyl(1H-1,2,3-triazol-4-yl)methanone derivatives in good yields at room temperature.
Asymmetric Construction of Six‐Membered Rings by Cyclization of Allenes with Dinuclear Gold Catalysis
作者:Youai Qiu、Jing Zhou、Junzhao Li、Chunling Fu、Yinlong Guo、Haoyang Wang、Shengming Ma
DOI:10.1002/chem.201503179
日期:2015.11.2
A simple and efficient method for the synthesis of 1,4‐dihydroarenes by gold‐catalyzed 6‐endo cyclization of benzylic allenes has been developed. Furthermore, asymmetric hydroarylation of enantioenriched allenes has been realized to offer a practical and convergent approach to aromatic ring‐fused six‐memberedcycles containing a chiral stereocenter such as 1,4‐dihydronaphthalenes, 1,4‐dihydrodibenzo[b
一种用于通过金催化6-合成的1,4- dihydroarenes简单且有效的方法内苄丙二烯的环化得到了发展。此外,已认识到对映体富集的烯的不对称加氢芳基化反应为包含手性立体中心的芳环稠合六元环(如1,4-二氢萘,1,4-二氢二苯并[ b,d ]噻吩,和双核[(dppm)Au 2 Cl 2施加4,7-二氢苯并[ b ]噻吩[dppm =亚甲基双(二苯基膦)]与AgOTf组合作为催化剂,以确保手性转移的高效率。ESI-MS已成功用于表征某些关键的反应性双核金中间体。
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