A new method for the generation of benzyl radicalsfrom acetals via low-valent titanium-mediated homolytic C–O bond cleavage is presented. The low cost and availability of the developed titanium reagent enable efficient access to α-alkoxy carbon radicalspecies via the developed reaction.
Visible Light-Induced γ-Alkoxynitrile Synthesis<i>via</i>Three- Component Alkoxycyanomethylation of Alkenes
作者:Hong Yi、Xu Zhang、Chu Qin、Zhixiong Liao、Jie Liu、Aiwen Lei
DOI:10.1002/adsc.201400548
日期:2014.9.15
A three‐componentalkoxycyanomethylation of alkenes is achieved using the iridium photoredox catalyst [fac‐Ir(ppy)3]. This catalytic radical difunctionalization accomplishes both alkylation and alkoxylation of alkenes in one pot. Various alcohols can serve as the alkoxy sources in this transformation. In addition, the introduced cyano group can undergo further transformations into various useful functional
使用铱光氧化还原催化剂[ fac -Ir(ppy)3 ]可实现烯烃的三组分烷氧基氰基甲基化。这种催化自由基双官能化可在一锅中完成烯烃的烷基化和烷氧基化。在这种转化中,各种醇可以用作烷氧基源。另外,引入的氰基可进一步转化成各种有用的官能团。
Expanding the Scope of Photocatalysis: Atom Transfer Radical Addition of Bromoacetonitrile to Aliphatic Olefins
作者:Errika Voutyritsa、Ierasia Triandafillidi、Christoforos G. Kokotos
DOI:10.1002/cctc.201800110
日期:2018.6.7
complexes, Ir(ppy)3 proved to be the best photocatalyst in promoting the addition of BrCH2CN to olefins. This photocatalytic atom transfer protocol can be expanded into a wide substrate scope of aliphatic olefins bearing various functional groups, leading to the corresponding products in good to excellent yields. In addition, linchpin catalysis was developed, since the bromo group can undergo further
A two carbon homologation of Friedel–Crafts alkylation enabled by photochemical alkene stitching: modular assembly of cyclolignans
作者:Shyamal Pramanik、Apurba Samanta、Soumitra Maity
DOI:10.1039/d4cc00957f
日期:——
efficient two-carbon homologated variant of Friedel–Crafts alkylation via photochemical radical alkene stitching. Readily available feedstock alkenes are used as bridges between photogenerated alkyl radicals and arenes, opening a route to γ-aryl-carbonyls for chemo-divergent access to aryltetralone and γ-lactones, a gateway to 2,7′-cyclolignans.