已经开发了通过有氧氧化裂解产生芳基甲二酸或串联好氧氧化/苯甲酸重排/脱羧以产生二芳基甲酮的二芳基酮的化学选择性转化。该转化是可控的,并且适用于广泛范围的底物,并以良好至优异的产率提供所需的产物。具有控制反应的机械洞察力,11 H NMR追踪和单晶X射线衍射揭示了一个复杂的机理网络,其中提出并验证了两个常见的中间体,α-酮氢过氧化物和二芳基乙二酮,以及三个可能的途径。这些途径是相互联系的,可以通过改变反应条件来合理地切换。这种方法能够实现可扩展的合成并获得许多有价值的化合物,包括维生素B 3,苯二酸和非甾体抗炎药酮洛芬。本协议代表了在利用复杂的机械网络来控制反应路径,从同一类起始原料获得不同合成方法方面迈出的一步。
1,1,2-Triphenylbut-1-enes: relationship between structure, estradiol receptor affinity, and mammary tumor inhibiting properties
作者:Martin R. Schneider、Erwin Von Angerer、Helmut Schoenenberger、Ralf T. Michel、H. P. Fortmeyer
DOI:10.1021/jm00351a013
日期:1982.9
substituted with acetoxy groups on one, two, or three aromatic rings in the para and/or meta positions, were synthesized. The identity of the occurring E and Z isomers were established by 1H NMR spectroscopy. A study on structure-activity relationships was carried out with regard to estradiolreceptoraffinity and to inhibiting effects on the growth of a postmenopausal human mammary carcinoma implanted
Diversity-Oriented Synthesis of Substituted Benzo[<i>b</i>]thiophenes and Their Hetero-Fused Analogues through Palladium-Catalyzed Oxidative CH Functionalization/Intramolecular Arylthiolation
作者:Anand Acharya、S. Vijay Kumar、Hiriyakkanavar Ila
DOI:10.1002/chem.201501828
日期:2015.11.16
benzo[b]thiophenes has been developed throughpalladium‐catalyzed intramolecular oxidative CH functionalization–arylthiolation of enethiolate salts of α‐aryl‐β‐(het)aryl/alkyl‐β‐mercaptoacrylonitriles/acrylates or acrylophenones. The overall strategy involves a one‐pot, two‐step process in which enethiolate salts [generated in situ through base‐mediated condensation of substituted arylacetonitriles, deoxybenzoins
Reductive homocoupling transformations mediated by bases and TMSCN have been used as a strategy for synthesis of 1,2-disubstituted ethanones. This protocol provides a method for synthesizing functionalized ethanones from aldehydes in one pot without transition metals.
Novel regioselective hydrodeoxygenation of α-diketones with phosphites as the deoxygenation reagent was realized via visible-light photoredox catalysis. Broad substrate scope and high functional group compatibility were obtained. Unsymmetric α-diketones were selectively reduced at the carbonyls of higher electrophilicity. This unique regioselectivity compared with available methods makes it a practical