Palladium(II) Acetate Catalyzed Tandem Cycloisomerization and Oxidation of Arylvinylcyclopropenes Using <i>p</i>-Benzoquinone as Oxidant and Pro-nucleophile
作者:Zhi-Bin Zhu、Min Shi
DOI:10.1021/ol902233r
日期:2009.11.19
Catalyzed by Pd(II)/p-BQ, a tandem cycloisomerization and oxidation of arylvinylcyclopropenes took place smoothly to produce methyleneindene derivatives stereoselectively in moderate to excellent yields, affording an unusual example of solo addition by p-hydroquinone generated by oxidation of Pd(0) to Pd(II) along with the formation of a new C−O bond.
加入Pd(II)催化的/ p -bq,串联和环异构的arylvinylcyclopropenes氧化发生顺利以产生methyleneindene衍生物立体选择性地在中等至良好的产率,得到独奏除了通过的一个不寻常的例子p的Pd,氧化产生的氢醌(0 )形成Pd(II),同时形成新的C-O键。
Photolysis of diarylvinylcyclopropenes for the construction of 1-methylene-8a-aryl-1,8a-dihydroazulene skeletons
作者:Fang-Fang Yu、Wang-Gui Yang、Min Shi
DOI:10.1039/b820212e
日期:——
Photoirradiation of vinylcyclopropenes 1 in a Pyrex tube provides 1-isopropylidene-3,8a-diphenyl-1,8a-dihydroazulene derivatives 2 in moderate to good yields within 4.5–14 h. A plausible mechanism has been discussed for the formation of these interesting products.
Preparation of Di-μ-chlorobis[π-1-chloro-1-aryl-2-(2′,2′-diarylvinyl)allyl]palladium(II) Complexes and a Novel Dehydrogenative Rearrangement of Arylvinylcyclopropenes for the Synthesis of 7<i>H</i>-Benzo[<i>c</i>]fluorene Derivatives
作者:Zhi-Bin Zhu、Kai Chen、Yin Wei、Min Shi
DOI:10.1021/om1009846
日期:2011.2.14
oro-1-aryl-2-(2′,2′-diarylvinyl)allyl]palladium(II) complexes has been developed from the reaction of arylvinylcyclopropenes with a Pd(II) complex along with a novel dehydrogenative rearrangement of arylvinylcyclopropenes via di-μ-chlorobis[π-1-chloro-1-aryl-2-(2′,2′-diarylvinyl)allyl]palladium(II) complexes to produce 7H-benzo[c]fluorenederivatives in good yields under mild conditions. A stoichiometric
通过芳基乙烯基环丙烯的反应,开发了一种新的合成方法,用于制备二-μ-氯双[π-1-氯-1-芳基-2-(2',2'-二芳基乙烯基)烯丙基]钯(II)配合物Pd(II)配合物,以及经由二-μ-氯双[π-1-氯-1-芳基-2-(2',2'-二芳基乙烯基)烯丙基]钯(II)配合物对芳基乙烯基环丙烯进行的新型脱氢重排在温和条件下以高收率生产7 H-苯并[ c ]芴衍生物。化学计算量的银盐或催化量的强布朗斯台德酸HOTf可能是这种有趣的脱氢重排的促进剂或催化剂。
Lewis Acid Catalyzed Rearrangement of Vinylcyclopropenes for the Construction of Naphthalene and Indene Skeletons
作者:Li-Xiong Shao、Yun-Peng Zhang、Ming-Hui Qi、Min Shi
DOI:10.1021/ol0626746
日期:2007.1.1
[reaction: see text] The choice of Lewis acid catalyst can result in dramatic differences in the chemoselectivity of the rearrangement reactions of vinylcyclopropenes. When BF3.OEt2 was used as the catalyst, naphthalenes were formed. However, when Cu(OTf)2 was used as the catalyst, indenes were obtained.