Activation of 1,1-difluoro-1-alkenes with a transition-metal complex: palladium(II)-catalyzed Friedel-Crafts-type cyclization of 4,4-(difluorohomoallyl)arenes.

Activation of 1,1-difluoro-1-alkenes with a transition-metal complex: palladium(II)-catalyzed Friedel-Crafts-type cyclization of 4,4-(difluorohomoallyl)arenes.
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DOI:
10.1021/ol702279w
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发表时间:
2007-10
期刊:
影响因子:
5.2
通讯作者:
M. Yokota;Daishi Fujita;J. Ichikawa
M. Yokota;Daishi Fujita;J. Ichikawa
中科院分区:
化学1区
文献类型:
--
作者:
M. Yokota;Daishi Fujita;J. Ichikawa

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阳离子钯(II)([Pd(MeCN)4](BF 4)2)提供了第一种用于缺电子1,1-二氟-1-烯烃的亲电活化的过渡金属催化方法,其允许它们通过Wacker型过程与分子内芳基进行Friedel-Crafts型环化。通过使用BF 3.OEt2,环化通过催化量的钯进行,而无需其再氧化。
Cationic palladium(II) ([Pd(MeCN)4](BF4)2) provides the first transition-metal-catalyzed method for electrophilic activation of electron-deficient 1,1-difluoro-1-alkenes, which allows their Friedel-Crafts-type cyclization with an intramolecular aryl group via a Wacker-type process. By using BF3.OEt2, the cyclization was effected by a catalytic amount of the palladium without its reoxidation.