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。
Ethyl lactate as a renewable carbonyl source for the synthesis of diynones
作者:Marta Solas、Samuel Suárez-Pantiga、Roberto Sanz
DOI:10.1039/c8gc03275k
日期:——
Ethyl lactate, a sustainable feedstock, serves as a highly attractive building block for the synthesis of value-added chemicals such as skipped diynones and, after gold-catalyzed transposition, conjugated diynones. Green solvents are involved in all steps and high yields are obtained for the final diynones which, in several cases, are isolated in a pure form without any purification.
In this paper a unique approach to the synthesis of polycyclic ring systems is disclosed. The approach features an intermolecular Diels-Alderreaction followed by an intramolecular Diels-Alderreaction where the regiochemistry of addition is controlled by substituents on the bisdiene and bisdienophile. This methodology has been applied to the synthesis of the fluorenone ring system. An efficient convergent
Boehm-Goessl,T. et al., Chemische Berichte, 1963, vol. 96, p. 2504 - 2513
作者:Boehm-Goessl,T. et al.
DOI:——
日期:——
Vereschagin, L. I.; Bol'shedovorskaya, R. L.; Maksikova, A. V., Journal of Organic Chemistry USSR (English Translation), 1987, vol. 23, # 11, p. 2030 - 2033
作者:Vereschagin, L. I.、Bol'shedovorskaya, R. L.、Maksikova, A. V.、Serebryakova, E. S.、Kozyrev, S. V.、et al.