Synthesis of DPPP- and DPPPEN-Type Bidentate Ligands by Ring-Opening Diphosphination of Methylene- and Vinylcyclopropanes under Visible-Light-Promoted Photoredox Catalysis
A ring-opening diphosphination of methylene- and vinylcyclopropanes with tetraaryldiphosphines (Ar2P-PAr2) has been developed to afford the corresponding 1,3-diphenylphosphinopropane- and 1,3-diphenylphosphinopentane-type bidentate ligands, respectively. The reaction proceeds under bromine cation-initiated, visible-light-promoted photoredox catalysis at ambient temperature. Owing to the ready availability
Silver-promoted oxidative sulfonylation and ring-expansion of vinylcyclopropanes with sodium sulfinates leading to dihydronaphthalene derivatives
作者:Pu Chen、Quan Zhou、Zan Chen、Yu-Kui Liu、Yun Liang、Ke-Wen Tang、Yu Liu
DOI:10.1039/d0ob01570a
日期:——
A simple and efficient silver-promoted sulfonylation and ring-expansion of vinylcyclopropanes with sodium sulfinates is established for the construction of 1-sulfonylmethylated 3,4-dihydronaphthalenes.
Intra- and intermolecular Fe-catalyzed dicarbofunctionalization of vinyl cyclopropanes
作者:Lei Liu、Wes Lee、Mingbin Yuan、Chris Acha、Michael B. Geherty、Brandon Williams、Osvaldo Gutierrez
DOI:10.1039/d0sc00467g
日期:——
halides and arylGrignardreagents has been realized via a mechanistically driven approach. Mechanistic studies support the diffusion of alkyl radical intermediates out of the solvent cage to participate in an intra- or intermolecular radical cascade with a range of VCPs followed by re-entering the Fe radical cross-coupling cycle to undergo (stereo)selective C(sp2)–C(sp3) bondformation. This work provides
Copper-promoted cyanoalkylation/ring-expansion of vinylcyclopropanes with α-C–H bonds in alkylnitriles toward 3,4-dihydronaphthalenes
作者:Zan Chen、Quan Zhou、Qing-Nan Chen、Pu Chen、Bi-Quan Xiong、Yun Liang、Ke-Wen Tang、Jun Xie、Yu Liu
DOI:10.1039/d0ob01864c
日期:——
A copper-promoted oxidative cyanomethylation/ring-expansion of vinylcyclopropanes with α-C(sp3)–H bonds in alkylnitriles is established for the generation of 1-cyanoethylated 3,4-dihydronaphthalenes. This cyanomethylation/ring-expansion involves a radical pathway and proceeds via cyanomethyl radical formation, radical addition and ring-expansion. This ring-expansion strategy offers a highly atom-economical
Visible-light-mediated difunctionalization of vinylcyclopropanes for the synthesis of 1-sulfonylmethyl-3,4-dihydronaphthalenes
作者:Qiao-Lin Wang、Wen-Zheng Zhang、Quan Zhou、Cong-Shan Zhou、Bi-Quan Xiong、Ke-Wen Tang、Yu Liu
DOI:10.1039/c9ob01321k
日期:——
An efficient method for visible-light-mediated sulfonylation/arylation of the C-C σ-bond in vinylcyclopropanes with sulfonyl chlorides to synthesize 1-sulfonylmethyl-substituted 3,4-dihydronaphalenes has been developed. A radical-type pathway has been proved in this transformation. This difunctionalization procedure shows a series of advantages, such as the use of commercially and easily available