and 3° alkyl iodides to ethenesulfonyl fluoride, employing Hantzschester as a hydrogen source at room temperature was developed. This method featured a wide substrate scope and great functional group compatibility, providing facile and robust process to alkyl sulfonyl fluorides including enzyme inhibitors, natural products and drugs derivatives in up to 99% yield. Further derivatization of resultant
Generation and reaction of alkyl radicals in open reaction vessels
作者:Elene Tatunashvili、Christopher S. P. McErlean
DOI:10.1039/d0ob01892a
日期:——
alkyl iodides into reactive alkyl radicals is described. Aryl diazonium salts react with Hantzsch esters and molecular oxygen to give aryl radicals, which participate in halogen atom transfers to give alkyl radicals. These intermediates react with a variety of acceptors. The reaction cascade occurs at room temperature, in open reaction vessels, with short reaction times.
Visible-Light-Mediated Manganese-Catalyzed Allylation Reactions of Unactivated Alkyl Iodides
作者:Xiaochen Wang、Jianyang Dong、Yongqiang Li、Yuxiu Liu、Qingmin Wang
DOI:10.1021/acs.joc.0c00861
日期:2020.6.5
report a protocol for visible-light-mediated allylation reactions between unactivated alkyl iodides and allyl sulfones under mild conditions with catalysis by inexpensive and readily available Mn2(CO)10. This protocol is compatible with a wide array of sensitive functional groups and has a broad substrate scope with regard to both alkyl iodides and allyl sulfones.
Iron-Catalyzed Oxyalkylation of Terminal Alkynes with Alkyl Iodides
作者:Weili Deng、Changqing Ye、Yajun Li、Daliang Li、Hongli Bao
DOI:10.1021/acs.orglett.8b03689
日期:2019.1.4
A general oxyalkylation of terminalalkynes enabled by iron catalysis has been developed. Primary and secondary alkyl iodides acted as the alkylating reagents and afforded a range of α-alkylated ketones under mild reaction conditions. Acetyl tert-butyl peroxide (TBPA) was used as the radical relay precursor, providing the initiated methyl radical to start the radical relay process. Preliminary mechanistic
We have developed a practical stereoretentive iodine/lithium‐exchange process that allows the stereodefined preparation of cis‐ and trans‐cycloalkyllithium compounds from their corresponding stereodefined iodides. Quenching with electrophiles offers stereospecific access to both cis‐ (up to 96 % cis) and trans‐cycloalkyl derivatives (up to 99 % trans). A detailed study of the thermodynamic stabilities