在Na 2 CO 3存在下,利用2,4-二烯基-1,3-二羰基化合物和碘作为亲电子试剂的环官能化反应,已经开发了一种简便的合成取代的3-(2-呋喃基)-2-呋喃酮的方法。,在回流的氯仿中。以中等至良好的产率获得化合物4,并通过1 H NMR,1 H COSY,13 C NMR和1 H- 13 C COSY建立其结构鉴定。已经提出了一种使亚基呋喃酮的形成合理化的机制。
Iodine promoted cyclofunctionalization reaction of 2,4-dialkenyl-1,3-dicarbonyl compounds
摘要:
The reactions of 2,4-dialkenyl-1,3-dicarbonyl compounds with I-2 lead to 5-iodoalkyl-4,5-dihydrofuran rings in good yield under mild conditions. (C) 1997 Elsevier Science Ltd.
Seleno and Telluro Cyclofunctionalization of α,γ-Diallyl-β-ketoesters: Polysubstituted Furan Derivatives
作者:Hblio A. Stefani、Nicola Petragnani、Carlos A. Brandt、Daniela G. Rando、Claudtte J. Valduga
DOI:10.1080/00397919908085985
日期:1999.10
Abstract Seleno- and telurocyclofunctionalized furan derivatives were prepared by reaction of phenylselenenyl bromide and p-methoxyphenyl tellurium trichloride with α,γ-diallyl-β-ketoesters in good yield.
Iodine promoted cyclofunctionalization reaction of 2,4-dialkenyl-1,3-dicarbonyl compounds
作者:Hélio A. Stefani、Nicola Petragnani、Claudéte J. Valduga、Carlos A. Brandt
DOI:10.1016/s0040-4039(97)01079-4
日期:1997.7
The reactions of 2,4-dialkenyl-1,3-dicarbonyl compounds with I-2 lead to 5-iodoalkyl-4,5-dihydrofuran rings in good yield under mild conditions. (C) 1997 Elsevier Science Ltd.
Iodo cyclofunctionalization of 2,4-dialkenyl-1,3-dicarbonyl compounds: Synthesis of substituted 3-(2-furylidene)-2-furanones
作者:Claudete J. Valduga、Hélio A. Stefani、Nicola Petragnani
DOI:10.1002/jhet.5570390406
日期:2002.7
A facile method for the synthesis of substituted3-(2-furylidene)-2-furanones has been developed using cyclofunctionalization reactions of 2,4-dialkenyl-1,3-dicarbonylcompounds and iodine as electrophile in the presence of Na2CO3, in refluxing chloroform. Compounds 4 are obtained in modest to good yields and their structural identification was established by 1H NMR, 1H COSY, 13C NMR and 1H-13C COSY
在Na 2 CO 3存在下,利用2,4-二烯基-1,3-二羰基化合物和碘作为亲电子试剂的环官能化反应,已经开发了一种简便的合成取代的3-(2-呋喃基)-2-呋喃酮的方法。,在回流的氯仿中。以中等至良好的产率获得化合物4,并通过1 H NMR,1 H COSY,13 C NMR和1 H- 13 C COSY建立其结构鉴定。已经提出了一种使亚基呋喃酮的形成合理化的机制。