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Rh-Catalyzed Direct Carboxylation of Alkenyl C-H Bonds of Alkenylpyrazoles.
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2020-05-16 , DOI: 10.1002/asia.202000476
Takanobu Saitou 1 , Yushu Jin 1 , Kotaro Isobe 1 , Takuya Suga 1 , Jun Takaya 1 , Nobuharu Iwasawa 1
Affiliation  

The Rh‐catalyzed direct carboxylation of alkenyl C−H bonds was achieved by using pyrazole as a removable directing group. In the presence of 5 mol% RhCl3 ⋅ 3H2O, 6 mol% P(Mes)3, and 2 equiv. of AlMe2(OMe), the alkenyl C−H bond of various alkenylpyrazoles was directly carboxylated in good yields under CO2 atmosphere. Furthermore, several useful transformations of the pyrazole moiety of the product were achieved to afford synthetically useful carboxylic acid derivatives in good yields.

中文翻译:

Rh催化的烯基吡唑的烯基CH键直接羧化。

通过使用吡唑作为可移动的导向基团,可实现Rh催化的烯基CH键的直接羧化。在5%(摩尔)的RhCl的存在3  ⋅3H 2 O,6摩尔%P(MES)3,和2当量 在AlMe 2(OMe)的作用下,各种烯基吡唑的烯基CH键在CO 2气氛下以良好的产率直接被羧化。此外,实现了产物的吡唑部分的几种有用的转化,以高收率提供了合成上有用的羧酸衍生物。
更新日期:2020-07-01
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