An Unexpected Domino Reaction of β-Keto Sulfones with Acetylene Ketones Promoted by Base: Facile Synthesis of 3(2<i>H</i>
)-Furanones and Sulfonylbenzenes
作者:Wei Tong、Qian-Yu Li、Yan-Li Xu、Heng-Shan Wang、Yan-Yan Chen、Ying-Ming Pan
DOI:10.1002/adsc.201700830
日期:2017.11.23
An unexpected domino reaction of β‐keto sulfones with acetylene ketones has been developed. The domino reaction of β‐keto sulfones with diynones proceeded smoothly in the presence of 30 mol% K2CO3 without other additives, and afforded the novel 3(2H)‐furanone derivatives. On replacing the diynones with terminal alkyne ketones, the reaction regioselectivity was changed and sulfonylbenzenes were obtained
β-酮砜与乙炔酮发生了意想不到的多米诺反应。在没有其他添加剂的情况下,在30 mol%K 2 CO 3的存在下,β-酮砜与二炔酮的多米诺反应顺利进行,得到了新颖的3(2 H)-呋喃酮衍生物。用末端炔烃酮取代二炔酮后,反应区域选择性改变,并通过苯环化获得磺酰苯,收率很高。
Transition Metal-Free Synthesis of 3-Alkynylpyrrole-2-carboxylates<i>via</i>Michael Addition/Intramolecular Cyclodehydration
作者:Qing-hu Teng、Yan-li Xu、Ying Liang、Heng-shan Wang、Ying-chun Wang、Ying-ming Pan
DOI:10.1002/adsc.201501073
日期:2016.6.16
the synthesis of 3‐alkynylpyrrole‐2‐carboxylates from diynones and glycine esters or 2‐aminoacetophenone hydrochloride has been developed. This transformation provides a large range of substituted pyrroles in good to excellent yields with the elimination of water as the only by‐product. The detailed mechanistic studies elucidated that this transformation involves a Michaeladdition/intramolecular cyclodehydration
Copper-catalyzed cascade aminoalkynylation–oxidation of propargylic alcohols has been realized, sterospecifically providing an array of (Z)-2-amino conjugated enynals/enynones in good yields under mild conditions. This transformation involves a rare 1,3-alkynyl migration of propargylic alcohols and simultaneously forms C–C, C–N, and C═O bonds. Furthermore, (Z)-2-amino conjugated enynals were applied
TfOH-Catalyzed Reaction of Bispropargyl Alcohols with 1,3-Dicarbonyl Compounds
作者:Na Wu、Yingming Pan、Qinghu Teng、Shikun Mo、Jiankun Pan、Hengshan Wang
DOI:10.1055/s-0035-1560372
日期:——
alcohols and 1,3-dicarbonylcompounds has been developed. The reaction of bispropargyl alcohol with 1,3-dicarbonylcompound proceeds through [3,3]-rearrangement, 6π-electrocyclization, and unexpected Csp3−Csp2 regioselective σ-bond cleavage processes. A transition-metal-free efficient method for the preparation of 1,2,3-trisubstituted benzenes from bispropargyl alcohols and 1,3-dicarbonylcompounds has been
Resin composition, image-forming material, and image-forming method
申请人:Tian Minquan
公开号:US08652718B2
公开(公告)日:2014-02-18
Provided is a resin composition containing a pyrylium-based squarylium compound represented by the following Formula (I) and a resin,
wherein in Formula (I), each of R1, R2, R3, and R4 independently represents an alkyl group having 2 to 5 carbon atoms.