Facile NBS/DMSO mediated dibromination of olefins including selected natural products and glycals
作者:Hafiz Ul Lah、Shabir Ahmad Mir、Gulzar Hussain、Rafiq Ahmad Wani、Syed Khalid Yousuf
DOI:10.1007/s12039-021-02003-3
日期:2022.3
diastereoselective vic-dibromination of olefins has been developed. The process employs a readily available N-Bromosuccinimide (NBS)/DMSO reagent system as a bromine source. High substrate scope, simple reaction conditions, application to natural products and glycals makes the process very attractive. Graphical abstract A highly chemo- and diastereoselective vic-dibromination of olefins has been developed. The process
Hydroformylation of glycals using a rhodium(I)(acac)(CO) 2 catalyst
作者:Mohindra Seepersaud、Mika Kettunen、Adnan S Abu-Surrah、Wolfgang Voelter、Yousef Al-Abed
DOI:10.1016/s0040-4039(02)02059-2
日期:2002.11
The hydroformylation of glycals was achieved using Rh(I)(acac)(CO)2 catalyst. For glucals, the C-2 formyl pyran was the major product whilst for galactal an equimolar mixture of the C-2 and C-1 regioisomers were observed.
Bis(arylsulfonyl) Peroxide-Mediated Difunctionalization of Cyclic Enol Ethers
作者:Ruairí O. McCourt、Armido Studer
DOI:10.1021/acs.joc.2c02541
日期:2023.2.3
bis(arylsulfonyl) peroxide-mediated 1,2-difunctionalization of cyclic enolethers is reported. Bis(nosyl) peroxide selectively sulfonylates the 3-position of enolethers, generating an oxocarbenium ion that is trapped by a carboxylic acid nucleophile at the 2-position. The reaction proceeds in a good yield and tolerates a variety of cyclic enolethers, including glycals as well as various carboxylic acids, which