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
Phosphine-Catalyzed Synthesis of 3-Allyl-4-pyrones by the Tandem Reaction of Diynones and Allylic Alcohols
作者:Ya-Fang Ye、Wan-Wan Yang、Jing-Wen Zhang、Ji-Ya Fu、Jun-Yan Zhu、Yan-Bo Wang
DOI:10.1021/acs.joc.1c01340
日期:2021.11.5
A simple and effective tandem reaction of diynones and allylicalcohols was developed to afford functionalized 3-allyl-4-pyrones in moderate to excellent yields. This protocol underwent a Michael addition─Claisen rearrangement─O-cyclization process, which exhibited broad substrate tolerance, high regioselectivity, and atom economy under a metal-free condition. Moreover, functional transformation of
RESIN COMPOSITION, IMAGE-FORMING MATERIAL, AND IMAGE-FORMING METHOD
申请人:TIAN Minquan
公开号:US20130189611A1
公开(公告)日:2013-07-25
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 R
1
, R
2
, R
3
, and R
4
independently represents an alkyl group having 2 to 5 carbon atoms.
Sequential [3+2] and [4+4] Annulation of Diynone and <i>o</i>‐Hydroxyaryl Azomethine Ylide: Construction of Dihydropyrrole Fused Eight‐Membered Ring Scaffold
作者:Jie Shen、Yu Xing、Lidong Fu、Yanze Li、Lei Cui、Zijun Zhou、Chunju Li、Jian Li
DOI:10.1002/adsc.202300998
日期:2023.12.5
We developed a cascade reaction of diynone and o-hydroxy aromatic aldimine under mild conditions. This protocol is proposed to proceed through sequential [3+2]/[4+4] cycloaddition and proton transfer processes, thus providing an efficient way for the synthesis of a variety of dihydropyrrole fused eight-membered ring scaffolds.