3333-44-6Relevant articles and documents
Asymmetric Catalysis via Cyclic, Aliphatic Oxocarbenium Ions
Lee, Sunggi,Kaib, Philip S. J.,List, Benjamin
supporting information, p. 2156 - 2159 (2017/02/23)
A direct enantioselective synthesis of substituted oxygen heterocycles from lactol acetates and enolsilanes has been realized using a highly reactive and confined imidodiphosphorimidate (IDPi) catalyst. Various chiral oxygen heterocycles, including tetrahydrofurans, tetrahydropyrans, oxepanes, chromans, and dihydrobenzofurans, were obtained in excellent enantioselectivities by reacting the corresponding lactol acetates with diverse enol silanes. Mechanistic studies suggest the reaction to proceed via a nonstabilized, aliphatic, cyclic oxocarbenium ion intermediate paired with the confined chiral counteranion.
Cyclic ethers to esters and monoesters to bis-esters with unconventional coupling partners under metal free conditions via sp3 C-H functionalisation
Majji, Ganesh,Guin, Srimanta,Rout, Saroj K.,Behera, Ahalya,Patel, Bhisma K.
supporting information, p. 12193 - 12196 (2015/01/09)
An efficient metal free oxidative esterification of sp3 C-H bonds (adjacent to an oxygen atom) in simple solvents like 1,4-dioxane, tetrahydropyran, tetrahydrofuran and ethyl acetate has been achieved using terminal aryl alkenes and alkynes as
Bu4NI-catalyzed C-O bond formation by using a cross-dehydrogenative coupling (CDC) reaction
Chen, Long,Shi, Erbo,Liu, Zhaojun,Chen, Shulin,Wei, Wei,Li, Hong,Xu, Kai,Wan, Xiaobing
experimental part, p. 4085 - 4089 (2011/05/03)
The creme de la creme! A practical and simple Bu 4NI-catalyzed C-O bond formation was achieved by using a cross-dehydrogenative coupling (CDC) reaction with tert-butyl hydroperoxide (TBHP) as the ultimate oxidant (see scheme; R1=aryl
