A gold(i)-catalyzed intramolecular oxidation–cyclopropanation sequence of 1,6-enynes: a convenient access to [n.1.0]bicycloalkanes
作者:Deyun Qian、Junliang Zhang
DOI:10.1039/c1cc14788a
日期:——
A gold(I)-catalyzed tandem oxidation/cyclopropanation reaction of 1,6-enynes with an external oxidant has been developed. This quite simple and rapid strategy will provide a safe, mild and versatile avenue to numerous carbo- and hetero [n.1.0]bicyclic frameworks.
Rhodium-catalyzed cycloaddition of 1,6-enynes with 2-bromophenylboronic acids: synthesis of a multi-substituted dihydronaphthalene scaffold
作者:Xianjie Fang、Chaolong Li、Xiaofeng Tong
DOI:10.1039/b910532h
日期:——
A formal [2 + 2 + 2] cycloaddition of a 1,6-enyne with 2-bromophenylboronic acid has been realized to construct a multi-substituted dihydronaphthalene scaffold, in which the direct reductive elimination mechanism of aryl-Rh(III)-Csp3 species has been established to form an aryl-Csp3 bond.
Structural factors affecting the selectivities in the palladium (II) catalyzed cyclization of N-alkenyl-2-alkynamides
作者:Huanfeng Jiang、Shengming Ma、Guoxin Zhu、Xiyan Lu
DOI:10.1016/0040-4020(96)00648-5
日期:1996.8
Palladiumcatalyzedcyclization of N-alkenyl 2-alkynamides occurred smoothly in the presence of CuCl2 and LiCl affording α-chloroalkylidene-γ-butyrolactams and α-chloroalkylidene-δ-valerolactams valerolactams stereoselectively. The regioselectivity of the intramolecular C-C double bond insertion was influenced by the substituent group on the substrate. When an alkyl group was introduced into the 1'-position
A Palladium-Catalyzed Cyclization−Oxidation Sequence: Synthesis of Bicyclo[3.1.0]hexanes and Evidence for S<sub>N</sub>2 C−O Bond Formation
作者:Xiaofeng Tong、Matthias Beller、Man Kin Tse
DOI:10.1021/ja070919j
日期:2007.4.1
A novel palladium-catalyzed cyclization−oxidation sequence yielding bicyclo[3.1.0]hexanes was developed. A mechanism involving a Pd(II)/Pd(IV) cycle was proposed. An SN2 C−O bond formation from an alkyl−palladium(IV) intermediate was also suggested.
开发了一种新的钯催化环化氧化序列,产生双环 [3.1.0] 己烷。提出了涉及 Pd(II)/Pd(IV) 循环的机制。还建议从烷基-钯(IV)中间体形成 SN2 CO 键。