Enantioselective Synthesis of C2-Quaternary Indolin-3-ones by Pt-Catalyzed Alkynylation of 2-Aryl-3<i>H</i>-indol-3-one with Alkynylsilanes
作者:Fan Yang、Shaojian Luo、Meifen Wang、Baomin Fan、Bo Yao
DOI:10.1021/acs.joc.3c02807
日期:2024.3.1
method for the synthesis of five-membered chiral propargylic amines from 2-aryl-3H-indol-3-one and alkynylsilanes has been developed. The reaction proceeded under the catalytic system of PtCl4, oxazoline-based ligand L11, Zn(CF3COO)2, and AcOH in DCE at 95 °C via in situ desilylation of TMS-alkynes. This methodology also highlights a new protocol for the in situ desilylation of alkynylsilanes. The reaction
On-Water Silver(I)-Catalyzed Cycloisomerization of Acetylenic Free Amines/Amides towards 7-Azaindole/Indole/Isoquinolone Derivatives
作者:Qiong Xie、Liming Shao、Hongpeng Sun、Li Xiao、Wei Li
DOI:10.1055/s-0036-1589072
日期:2017.11
Silver-catalyzed on-water intramolecular cyclization of acetylenic free amines is reported, which affords 7-azaindoles in good to excellent yields. Neither strong base/acid catalysts nor N-substituted substrates are required to achieve this cycloisomerization. Hydrogen bonds between water medium and the substrates play an important role in improving chemical reactivity and regioselectivity. Furthermore, the
Pd-Catalyzed Asymmetric Allylation Reaction of 2-Aryl-3<i>H</i>-indol-3-ones with Allyltrimethylsilane
作者:Fan Yang、Lun Wang、Meiqi Liang、Linchun Zhang、Baomin Fan、Bo Yao
DOI:10.1021/acs.joc.3c02599
日期:2024.2.2
time. The reaction proceeded under the catalysis of Pd(OAc)2 and chiral phosphoric ligand L11 in the presence of Cu(CF3COO)2·XH2O, PivOH, and 5 Å molecular sieves in DMSO at 60 °C. The present methodology can avoid the impact of amine products generated by the reaction on the catalyst, and at the same time, the high catalytic activity of classical palladiumcatalysts still has catalytic ability for low
首次开发了2-芳基-3H-吲哚-3-酮与烯丙基三甲基硅烷首次烯反应的有效方法。该反应在Pd(OAc) 2和手性磷酸配体L11的催化下,在Cu(CF 3 COO) 2 · X H 2 O、PivOH和5 Å分子筛的存在下,在DMSO中于60℃下进行。本方法可以避免反应生成的胺产物对催化剂的影响,同时经典钯催化剂的高催化活性仍然对低亲电子酮亚胺具有催化能力。所需产物具有优异的产率和良好的对映选择性。