<scp>Pd‐Catalyzed</scp>
2,
<scp>3‐Allenylation</scp>
of Oxindoles with 2,
<scp>3‐Allenylic</scp>
Carbonates
作者:Jie Lin、Minqiang Jia、Shengming Ma
DOI:10.1002/cjoc.202100402
日期:2021.11
Allenes and oxindoles are two classes of very important compounds for medicinal chemistry and organic chemistry. Thus, it is of high interest to combine an allene and an oxindole into one molecule. Herein, the first example of palladium-catalyzed exclusive 2,3-allenylation reaction of oxindoles with 2,3-allenylic carbonates has been successfully developed. A rationale for the selectivity of 2,3-allenylation
Palladium-Catalyzed Asymmetric Benzylation of 3-Aryl Oxindoles
作者:Barry M. Trost、Lara C. Czabaniuk
DOI:10.1021/ja1079755
日期:2010.11.10
we report palladium-catalyzedasymmetric benzylic alkylation with 3-aryl oxindoles as prochiral nucleophiles. Proceeding analogously to asymmetricallylicalkylation, asymmetric benzylation occurs in high yield and enantioselectivity for a variety of unprotected 3-aryl oxindoles and benzylic methyl carbonates using chiral bisphosphine ligands. This methodology represents a novel asymmetric carbon-carbon
The bifunctional quinine-derived thiourea catalyst 14 was found to catalyze the direct amination of unprotected3-aryl and aliphatic substitutedoxindoles with di-tert-butylazodicarboxylate (DBAD) to construct a tetrasubstituted stereogenic carbon center at the C-3 position of oxindoles in good to excellent yield and enantioselectivity.
Chiral Calcium Phosphate-Catalyzed Enantioselective Amination of 3-Aryl-2-oxindoles with Dibenzyl Azodicarboxylate
作者:Zhenwei Wu、Suvratha Krishnamurthy、K. S. Satyanarayana Tummalapalli、Jon C. Antilla
DOI:10.1021/acs.joc.2c00432
日期:2022.6.17
A chiral calcium phosphate-catalyzed enantioselective amination of 2-oxindoles with dibenzyl azodicarboxylate has been developed, affording the products in consistently high yields and excellent enantioselectivity. This synthetic method features low catalyst loading and a high catalytic efficiency. Moreover, the practical value of this process is well demonstrated by a scale-up experiment and a trial
Synthesis of Sulfur-Containing Oxindoles by Photoinduced Alkene Difunctionalization via Sulfur 1,2-Relocation
作者:Cong Lu、Rui Chen、Rui Wang、Dong Jing、Ke Zheng
DOI:10.1021/acs.orglett.2c04189
日期:2023.2.10
which have been widely applied in agrochemicals and pharmaceuticals. Herein, a new approach for the efficient construction of sulfur-containing oxindoles by photoinduced alkene difunctionalization via sulfur 1,2-relocation is developed. The method exhibited a high functional group tolerance and broad substrate compatibility. A library of sulfur-containing oxindole derivatives were synthesized under mild