首次公开了通过炔的亲电碳硫基化对轴向手性化合物的对映选择性结构。通过使用Ts保护的双官能硫化物催化剂和Ms保护的邻炔基芳基胺(Ts =甲苯磺酰基; Ms =甲磺酰基),可以实现这种对映选择性转化。亲电芳基硫醇化试剂和亲电三氟甲基硫醇化试剂均适用于该反应。轴向手性乙烯基-芳基氨基硫化物的所得产物可以容易地转化为联芳基氨基硫化物,联芳基氨基亚砜,联芳基胺,乙烯基芳基胺和其他有价值的双官能化化合物。
Gold(I)-Catalyzed Formal Intramolecular Dehydro-Diels–Alder Reaction of Ynamide-ynes: Synthesis of Functionalized Benzo[<i>b</i>]carbazoles
作者:Wei Xu、Gaonan Wang、Xin Xie、Yuanhong Liu
DOI:10.1021/acs.orglett.8b01145
日期:2018.6.1
ynamide-ynes via a formal dehydro-Diels–Alder reaction has been developed, providing an attractive route to diversely substituted benzo[b]carbazoles. The reaction likely proceeds via regioselective attack of the pendant alkyne moiety to a keteniminium ion intermediate followed by benzannulation. The method offers several advantages such as high efficiency, mild reaction conditions, and wide functional group
已经开发了通过正式的脱氢-狄尔斯-阿尔德反应的金催化的炔基-炔烃环异构化反应,为各种取代的苯并[ b ]咔唑提供了诱人的途径。该反应可能是通过炔烃侧基区域选择性地攻击酮亚胺离子中间体并随后进行苯环化而进行的。该方法具有许多优点,例如高效,温和的反应条件和宽泛的官能团耐受性,可作为对乙酰胺炔炔的热DDA反应的高度有用的补充。
Cyclic <i>Anti</i>-Azacarboxylation of 2-Alkynylanilines with Carbon Dioxide
作者:Bukeyan Miao、Suhua Li、Gen Li、Shengming Ma
DOI:10.1021/acs.orglett.6b00884
日期:2016.6.3
compounds for the synthesis of many biologically active compounds, efficiently under 1 atm of CO2. The readily available nature of the different starting materials and tolerance of variousfunctionalgroups provide vast opportunities for the efficient construction of diversified libraries for bioactive compounds listed in Figure 1. As an example, this methodology has been applied to the synthesis of Lotronex
A borylative cyclisation towards indole boronic esters
作者:Jianhui Huang、Simon J. F. Macdonald、Joseph P. A. Harrity
DOI:10.1039/c0cc03577g
日期:——
2-Alkynylaniline borylative cyclisations provide a direct means to access indole 3-boronic esters from simple precursors. The Pd-catalysed cyclisation can be merged with cross-coupling processes in the same reaction vessel, moreover, the products can be exploited in C–N bond forming reactions.
Rh(III)-Catalyzed Asymmetric Synthesis of Axially Chiral Biindolyls by Merging C–H Activation and Nucleophilic Cyclization
作者:Miaomiao Tian、Dachang Bai、Guangfan Zheng、Junbiao Chang、Xingwei Li
DOI:10.1021/jacs.9b04711
日期:2019.6.19
herein is the mild and highly enantioselective synthesis of 2,3'-biindolyls via underexplored integration of C-Hactivation and alkyne cyclization using a unified chiral Rh(III) catalyst. The reaction proceeded via initial C-Hactivation followed by alkyne cyclization. A chiral rhodacyclic intermediate has been isolated from stoichiometric C-Hactivation, which offers direct mechanistic insight.
Palladium-Catalyzed Synthesis of Functionalized Indoles by Acylation/Allylation of 2-Alkynylanilines with Three-Membered Rings
作者:Weiliang Yuan、Xiaojiao Li、Zisong Qi、Xingwei Li
DOI:10.1021/acs.orglett.2c00246
日期:2022.3.25
Palladium-catalyzed synthesis of 3-acyl and -allyl indoles has been realized by merging nucleophilic cyclization of ortho-alkynylanilines with ring opening of three-memberedrings such as cyclopropenones and gem-difluorinated cyclopropanes. These functionalized indoles were obtained in moderate to high yields with high stereoselectivity in both cases. This protocol provides an alternative method toward