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 sulfur ylides 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 sulfur ylides 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。