Bismuth(III) Triflate-Catalyzed Intermolecular Cyclization of Phenols with Diols: Direct Access to O-Heterocycles
作者:Maki Minakawa、Yuya Sakurai
DOI:10.1055/a-1770-7922
日期:2022.4
A direct access to O-heterocycles by Bi(OTf)3-catalyzed intermolecular cyclization of phenols with diols is described. Catalytic dehydrative tandem formation of C–O and C–C bonds was achieved by using a Bi(OTf)3 catalyst without any additives. The catalytic intermolecular cyclization of phenols with various diols proceeded to give the corresponding chromanes in up to 91% yield and/or pyran derivatives
A recyclable copper(ii) catalyst for the annulation of phenols with 1,3-dienes
作者:Luis A. Adrio、King Kuok (Mimi) Hii
DOI:10.1039/b719465j
日期:——
Air- and moisture-stable Cu(OTf)2–bipy catalyses the addition of phenols to 1,3-dienes under aerobic conditions in a tandem hydroalkoxylation–rearrangement–hydroalkylation sequence, furnishing O-heterocycles in moderate to good yields, and can be recycled without any loss in catalytic activity.