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Wei Xiong
Michael reactionOrganic chemistryChemistryKeteneCycloaddition
10Publications
2H-index
9Citations
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Publications 10
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#1Xiao-Dan HanH-Index: 2
#2Jian-Ping FuH-Index: 2
Last. Lei WuH-Index: 3
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Abstract A series of fully substituted 2-pyridone 2 and functionalized α-pyrones 3 are synthesized starting from cyclobutenones 1 under a base-promoter in toluene at 80 ℃. This rearrangement is complimentary to the previously reported ring expansion of cyclobutenones, providing a divergent synthesis of corresponding products from the same precursor 1. In addition, α-pyrones 3 has also been applied to the synthesis of aromatic amines 7 in good yields (64–83%) and in a highly regioselective manner...
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#2Jianguo XuH-Index: 1
Last. Ju-Wu HuH-Index: 2
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#1Lei WuH-Index: 3
#2Wei XiongH-Index: 2
Last. Young-Soo BaeH-Index: 13
view all 12 authors...
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#1Wei XiongH-Index: 2
#2Jian-Ping FuH-Index: 2
Last. Lei WuH-Index: 3
view all 6 authors...
2 CitationsSource
#1Wei XiongH-Index: 2
#2Lei WuH-Index: 3
Last. Xiong-Hui LiH-Index: 1
view all 9 authors...
Source
#1Lei Wu (Tianjin University of Science and Technology)H-Index: 6
#2Wei XiongH-Index: 2
Last. Junhui WangH-Index: 1
view all 7 authors...
1 CitationsSource
#1Lei WuH-Index: 3
#2Wei XiongH-Index: 2
Last. Gang XuH-Index: 2
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High-speed counter-current chromatography (HSCCC) combined with macroporous resin (MR) column was successfully applied to the isolation and purification of four flavonoid glycosides from the medicinal herb Lotus plumule (LP). A polar two-phase solvent system composed of ethyl acetate–n-butanol–water (1:2:3, v/v/v) was selected by high-performance liquid chromatography (HPLC) and run on a preparative scale where the lower aqueous phase was used as the mobile phase with a head-to-tail elution mode...
4 CitationsSource
#1Xiao-Dan HanH-Index: 2
Last. Ju-Wu HuH-Index: 2
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An efficient synthetic route to highly substituted pyrrolidone derivatives has been developed from an easily available alkynyl carboxamide and 4-methylbenzenesulfonic acid (PTSA). In the reaction, PTSA is not only used as acid catalyst but also as a reactant to provide a source for OTs group. A mechanism is proposed to involve the protonation of the alcohol substrate/cyclopropylcarbinol-homoallylic rearrangement/intramolecular N-nucleophilic cyclization reactions.
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#1Lei WuH-Index: 3
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Basil ( Ocimum basilicum ) , an edible and medicinal plant with high nutritional value and therapeutic efficacy, was used as a potential source of total flavonoids in this study. Heat reflux extractions were performed using aqueous ethanol. The optimized extraction conditions of total flavonoids from O. basilicum were determined by Box-Behnken design with response surface methodology. Response surface plots showed that the optional four independent variables significantly influenced the extracti...
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#1Xiao-Dan HanH-Index: 2
#2Hui-Bin WangH-Index: 2
Last. Xiong-Hui LiH-Index: 1
view all 9 authors...
A series of 2-pyridone derivatives have been synthesized via a formal [3+3] annulation strategy starting from readily available α-EWG-α-formyl ketene- S , S -acetal 1 and α-carbamoyl ketene- S , S -acetals 2 in the presence of CH 3 COOH at 80 °C in excellent yields (91–98%). A mechanism involving sequential Baylis–Hillman reaction, intramolecular cycloaddition, Michael addition, and alkylthiol elimination processes for this novel reaction is described in the Letter. In addition, substituted 1-ar...
2 CitationsSource
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