Free radical-mediated alkylation of general alkenes is a challenging and largely unmet goal. Herein, we disclose a conceptually novel "polarity umpolung" strategy for radical alkylation of alkenes using a portfolio of easily-accessed, dual-function alkylating reagents. This is achieved by substituting inherently nucleophilic alkyl radicals with electrophilic sulfone-decorated surrogates, thus inverting
Visible-Light-Triggered Sulfonylation/Aryl Migration/Desulfonylation and C–S/Se Bond Formation Reaction: 1,2,4-Trifunctionalization of Butenyl Benzothiazole Sulfone with Thiosulfonate/Selenosulfonates
作者:Xin-Yu Liu、Shi-Yin Tian、Yi-Fan Jiang、Weidong Rao、Shun-Yi Wang
DOI:10.1021/acs.orglett.1c02981
日期:2021.11.5
A visible-light-triggered radical cascade sulfonylation/aryl migration/desulfonylation and C–S/Se bond formation reaction of butenyl benzothiazole sulfone with thiosulfonates or selenosulfonates is developed. This study affords the 1,2,4-trifunctionalization of butenyl benzothiazole sulfone derivatives under mild conditions.
PEPTIDE NUCLEIC ACID DERIVATIVES WITH GOOD CELL PENETRATION AND STRONG AFFINITY FOR NUCLEIC ACID
申请人:Lee Jong-Ook
公开号:US20110178031A1
公开(公告)日:2011-07-21
The present invention provides a novel class of peptide nucleic acid derivatives, which show good cell penetration and strong binding affinity for nucleic acid.
Synthesis of enol ethers from lactones using modified Julia olefination reagents: application to the preparation of tri- and tetrasubstituted exoglycals
作者:Benjamin Bourdon、Matthieu Corbet、Patrice Fontaine、Peter G. Goekjian、David Gueyrard
DOI:10.1016/j.tetlet.2007.11.206
日期:2008.1
A new route to substituted exoglycals from the corresponding lactones is described. The enol ethers synthesis via a modifiedJuliaolefination of sugar-derivedlactones is extended to substituted benzothiazolyl sulfones to furnish tri- and tetrasubstituted exoglycals.
finds limited applications in fine chemical synthesis, resulting in molecules of modest complexity. Ethylene difunctionalization allows for the synthesis of much more complex chemicals, but it is rare and almost always relies on transition-metal catalysis. Herein, we report an unprecedented metal-free radical difunctionalization of ethylene through a functional group migration strategy. The use of sulfone-based