One-pot synthesis of α-methyl ketones starting from 1,3-diaryl propenols or 1-aryl propenols and methanol as a C1 source is demonstrated. This one-pot isomerization-methylation is catalyzed by commercially available Pd(OAc)2 with H2O as the only by-product. Mechanistic studies and deuterium labelling experiments indicate the involvement of isomerization of allyl alcohol followed by methylation through
Dehydration in water: frustrated Lewis pairs directly catalyzed allylization of electron-rich arenes and allyl alcohols
作者:Hua Zhang、Xiao-Yu Zhan、Yu Dong、Jian Yang、Shuai He、Zhi-Chuan Shi、Xiao-Mei Zhang、Ji-Yu Wang
DOI:10.1039/d0ra02912b
日期:——
A frustratedLewispair (FLP)-catalyzed allylation of allyl alcohols with electron-rich arenes has been developed. Interestingly, in this reaction, the electron-rich arenes and allyl alcohols are dehydrated in water. What's more, water was the sole byproduct of the reaction. In this protocol, various allyl alcohols can be converted into allyl cations and attacked by the electron-rich arenes to form
一种受阻路易斯对(FLP)催化的烯丙醇与富电子芳烃的烯丙基化已经被开发出来。有趣的是,在该反应中,富电子芳烃和烯丙醇在水中脱水。更重要的是,水是反应的唯一副产物。在该方案中,各种烯丙醇可以转化为烯丙基阳离子并被富电子芳烃攻击形成芳基阳离子中间体。最后,芳基阳离子中间体去质子化得到1,3-二芳基丙烯。在该方案中,吲哚烯丙醇可以发生双分子闭环反应,可以顺利得到结构多样的四氢吲哚并[3,2- b ]咔唑。该反应对氧气不敏感,并且是在克级水平上进行的。