Reaction of Allylic Phosphoranes with Iron Porphyrin Carbenoids: Efficient, Selective, and Catalytic Intermolecular Formal Carbenoid Insertion into Olefinic C−H Bonds
作者:Sunewang R. Wang、Chun-Yin Zhu、Xiu-Li Sun、Yong Tang
DOI:10.1021/ja8097959
日期:2009.4.1
A highly efficient, selective, and catalytic intermolecular formal carbenoidinsertionreaction into olefinic C-Hbonds of allylic phosphoranes is described. This novel insertionreaction proved to proceed via a catalytic cyclopropanation of allylic phosphoranes with diazoacetate, followed by ring opening of the resulting cyclopropane ylide. On the basis of this observation, a facile synthetic method
The [4+3] annulation reaction of crotonic acid derivative sulfur ylides with thioaurones has, for the first time, been reported using NaH as the base. A diverse array of 2,5-dihydrobenzo[4,5]thieno[3,2-b]oxepines is obtained in good to excellent yields. The proposed mechanism is investigated and supported by DFT calculations.
Construction of Oxepino[3,2‐
<i>b</i>
]indoles via [4+3] Annulation of 2‐Ylideneoxindoles with Crotonate‐Derived Sulfur Ylides
作者:Xing‐Hai Fei、Yong‐Long Zhao、Fen‐Fen Yang、Xiang Guan、Zong‐Qin Li、Da‐Peng Wang、Meng Zhou、Yuan‐Yong Yang、Bin He
DOI:10.1002/adsc.202001580
日期:2021.6.21
A [4+3] annulation of 2-ylideneoxindoles with crotonate-derived sulfur ylides has been developed. A series of oxepino[3,2-b]indoles were prepared in moderate to excellent yields (62-93%) under mild conditions. Moreover, the synthetic oxepino[3,2-b] indoles can be further transformed into more complex cyclopropa[5,6]oxepino[3,2-b]indoles via a [2+1] cyclopropanation. In addition, the synthetic compounds
已经开发了 2-ylideneoxindoles 与巴豆酸盐衍生的硫叶立德的 [4+3] 环化。在温和的条件下,以中等至极好的收率 (62-93%) 制备了一系列 oxepino[3,2- b ] 吲哚。此外,合成的oxepino[3,2- b ]吲哚可以通过[2+1]环丙烷化进一步转化为更复杂的环丙[5,6]oxepino[3,2- b ]吲哚。此外,合成的化合物对K562和MCF-7细胞显示出一定的抗增殖活性,对这两种肿瘤细胞的IC 50值分别高达5.40±0.88 μM和18.41±0.50 μM。
Darzens reaction of thioisatins and sulfonium salts: approach to the synthesis of thiochromenone derivatives with anticancer potency
A new Darzens reaction of thioisatins and sulfonium salts has, for the first time, been reported. This reaction allows efficient access to thiochromenone derivatives in good to excellent yields under mild reaction conditions. The substrate scope includes both electron-withdrawing and electron-donating groups on both the thioisatins and sulfonium salts. Moreover, some of the synthesized thiochromenone
Efficient Synthesis of 4,7-Dihydro-1H-oxepino[2,3-c]pyrazoles by Potassium Carbonate Promoted [4+3] Annulation of Crotonate-Derived Sulfur Ylides with Benzylidenepyrazolones
作者:Dian Wang、Xue Wang、Xuange Zhang、Zhiwei Miao
DOI:10.1055/s-0037-1610693
日期:2019.5
crotonate-derived sulfurylides with benzylidenepyrazolones using K2CO3 as the base is reported. The ready availability of starting materials and the simple cyclization procedure make this approach suitable for the preparation of a diverse array of 4,7-dihydro-1H-oxepino[2,3-c]pyrazoles in good to excellent yields. The [4+3] annulation reaction of crotonate-derived sulfurylides with benzylidenepyrazolones
专用于100的庆典日南开大学周年 抽象的 报道了以K 2 CO 3为碱的巴豆酸衍生的硫酰化物与亚苄基吡唑并酮的[4 + 3]环化反应。原料的容易获得和简单的环化程序使该方法适用于以良好或优异的收率制备各种4,7-二氢-1 H-氧代庚并[2,3- c ]吡唑。 报道了以K 2 CO 3为碱的巴豆酸衍生的硫酰化物与亚苄基吡唑并酮的[4 + 3]环化反应。原料的容易获得和简单的环化程序使该方法适用于以良好或优异的收率制备各种4,7-二氢-1 H-氧代庚并[2,3- c ]吡唑。