Benzoyl trifluoromethanesulphonate. A highly efficient benzoylating agent for sterically hindered hydroxy groups
作者:Masato Koreeda、Lindsey Brown
DOI:10.1039/c39830001113
日期:——
Reactions of benzoyltrifluoromethanesulphonate (BzOTf) with a variety of alcohols, including some with stericallyhindered secondary and tertiary hydroxy goups, with phenolic compounds, and with 1,2-diols at low temperatures provide the corresponding benzoates in high yield.
<i>N</i>-Benzoyl-4-(dimethylamino)pyridinium Chloride: Isolation and Use for the Direct Benzoylation of Alcohols
作者:Michael S. Wolfe∗
DOI:10.1080/00397919708005004
日期:1997.9
A simple method for the formation and isolation of N-benzoyl-4-(dimethylamino) pyridinium chloride is described. This reagent can be employed directly for the benzoylation of secondary and tertiary alcohols.
Epimerization of Tertiary Carbon Centers via Reversible Radical Cleavage of Unactivated C(sp<sup>3</sup>)–H Bonds
作者:Yaxin Wang、Xiafei Hu、Cristian A. Morales-Rivera、Guo-Xing Li、Xin Huang、Gang He、Peng Liu、Gong Chen
DOI:10.1021/jacs.8b05753
日期:2018.8.1
cleavage of C(sp3)-H bonds can enable racemization or epimerization, offering a valuable tool to edit the stereochemistry of organic compounds. While epimerization reactions operating via cleavage of acidic C(sp3)-H bonds, such as the Cα-H of carbonyl compounds, have been widely used in organic synthesis and enzyme-catalyzed biosynthesis, epimerization of tertiary carbons bearing a nonacidic C(sp3)-H bond