Phosphine-Catalyzed Enantioselective γ-Addition of 3-Substituted Oxindoles to 2,3-Butadienoates and 2-Butynoates: Use of Prochiral Nucleophiles
作者:Tianli Wang、Weijun Yao、Fangrui Zhong、Guo Hao Pang、Yixin Lu
DOI:10.1002/anie.201307757
日期:2014.3.10
first phosphine‐catalyzed enantioselective γ‐addition with prochiral nucleophiles and 2,3‐butadienoates as the reaction partners has been developed. Both 3‐alkyl‐ and 3‐aryl‐substitutedoxindoles could be employed in this process, which is catalyzed by a chiral phosphine that is derived from an amino acid, thus affording oxindoles that bear an all‐carbon quaternary center at the 3‐position in high yields
Asymmetric Synthesis of Spirooxindole δ-Lactones with Vicinal Tertiary and Quaternary Stereocenters via Regio-, Diastereo-, and Enantioselective Organocatalytic Vinylogous Aldol-cyclization Cascade Reaction
作者:Jeng-Liang Han、You-Da Tsai、Chia-Hao Chang
DOI:10.1002/adsc.201701104
日期:2017.11.23
A highly region-, diastereo-, and enantioselectiveorganocatalytic vinylogous aldol-cyclization cascade reaction of prochiral 3-akylidene oxindoles to isatins has been achieved by using bifuctional organocatalysts. A variety of enantioenriched spirooxindole δ-lactones with vicinal tertiary and quaternary stereocenters were generated in good to excellent yields with good to high diastereoselectivities
Reductive coupling of isatins with ketones and aldehydes by low-valent titanium
作者:Naoki Kise、Kouta Sasaki、Toshihiko Sakurai
DOI:10.1016/j.tet.2014.10.071
日期:2014.12
The reductivecoupling of isatins with ketones and aldehydes by Zn–TiCl4 in THF gave two- and four-electron reduced products, 3-hydoxy-3-(1-hydoxyalkyl)oxindoles and 3-alkylideneoxindoles, selectively by controlling the reaction conditions. Although the 3-(1-hydoxyalkyl)oxindoles were also produced as the four-electron reduced products in some cases, these products were readily dehydrated to 3-alkylideneoxindoles
Visible-Light-Mediated Intermolecular [2 + 2]-Cycloaddition Reaction of 3-Alkylideneindolin-2-one with Alkenes via Triplet Energy Transfer for the Synthesis of 3-Spirocyclobutyl Oxindoles
作者:Shao-Xian Shi、Huan-Huan Zhang、Yi-Lin Wang、Lin-Hong Jiang、Peng-Fei Xu、Yong-Chun Luo
DOI:10.1021/acs.orglett.3c01695
日期:2023.7.28
[2 + 2]-Cycloaddition is the most straightforward approach to the construction of cyclobutanes. In this paper, the intermolecular [2 + 2]-cycloaddition reaction of 3-alkylideneindolin-2-ones with alkenes was achieved. This reaction can be used in the synthesis of 3-spirocyclobutyl oxindoles, polycyclic oxindoles, and latestagemodification of some drug molecules.