Enantioselective Synthesis of CF<sub>3</sub>
-Containing 3,2’-Pyrrolidinyl Spirooxindoles and Dispirooxindoles via Thiourea-Catalyzed Domino Michael/Mannich [3+2] Cycloaddition Reactions
作者:Ye Lin、Yong-Xing Song、Da-Ming Du
DOI:10.1002/adsc.201801608
日期:2019.3.5
An efficient and practical organocatalyticasymmetricdomino Michael/Mannich [3+2] cycloaddition of N‐2,2,2‐trifluoroethylisatin ketimines and arylidene azlactones by using a hydroquinine‐derived thiourea as the catalyst has been disclosed. Under mild conditions, a broad range of CF3‐containing 3,2’‐pyrrolidinyl spirooxindole/ dispirooxindole derivatives bearing four adjacent stereogenic centers including
Cascade reaction synthesis of multisubstituted bicyclic pyridone derivatives
作者:Xuebing Chen、Dandan Zhu、Xiaoying Wang、Shengjiao Yan、Jun Lin
DOI:10.1016/j.tet.2013.08.052
日期:2013.11
An efficient synthesis of novel bicyclic pyridone derivatives via cascade reaction of heterocyclic ketene aminals (HKAs) and 4-arylmethylene-2-phenyloxazol-5(4H)-ones in the presence of acetic acid has been established. Significantly, the protocol affords a straightforward approach to the construction of multisubstituted bicyclic pyridones in which one C–O bond was cleaved and new C–C and C–N bonds
Phase-transfer catalyzed Michael/ammonolysis cascade reactions of enaminones and olefinic azlactones: a new approach to structurally diverse quinoline-2,5-diones
作者:Lin Chen、Wei Liang
DOI:10.1039/d2ob00096b
日期:——
Michael/ammonolysis cascade reactions between cyclohexane-1,3-dione-derived enaminones and olefinic azlactones via phase-transfer catalysis have been developed. This method provides rapid access to a suite of architecturally complex and diverse quinoline-2,5-diones bearing a secondary amide group at the C-3 position in moderate to excellent yields (53–94%) and with excellent diastereoselectivities
New 2-aminobenzothiazole derivatives: Design, synthesis, anti-inflammatory and ulcerogenicity evaluation
作者:Sara S. Awaad、Mona O. Sarhan、Walaa R. Mahmoud、Tamer Nasr、Riham F. George、Hanan H. Georgey
DOI:10.1016/j.molstruc.2023.136042
日期:2023.11
Two series of twenty diversely substituted benzothiazole amides were designed and synthesized aiming to obtain derivatives with potential anti-inflammatory activity and decreased GIT ulceroginicity. All the synthesized compounds were in-vivo screened for their anti-inflammatory activity using carrageenan induced rat hind paw edema model. Results revealed that compounds 3h and 6a were the most potent
A Tunable Cascade Reaction of Ureidomalonates and Alkenyl Azlactones for the Divergent Synthesis of Hydantoins with Distinct Functional Groups
作者:Lin Chen、Di Wang
DOI:10.1021/acs.joc.3c02814
日期:2024.3.1
A tunable cascade reaction of ureidomalonates and alkenyl azlactones was disclosed, which gave rise to the construction of N-aroyl α-amino acid ester and imide-functionalized hydantoins in moderate to good yields and with excellent diastereoselectivities. The reaction pathway was precisely manipulated by organocatalysis and phase-transfer/sunlight relay catalysis, respectively, to realize the divergent