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Your search keyword '"Wang, Shao-Hua"' showing total 12 results
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12 results on '"Wang, Shao-Hua"'

2. ChemInform Abstract: Propargylic Cation-Induced Intermolecular Electrophilic Addition-Semipinacol Rearrangement.

Author

Shao, Hui, Zhang, Xiao‐Ming, Wang, Shao‐Hua, Zhang, Fu‐Min, Tu, Yong‐Qiang, and Yang, Chao

Subjects
*ALLYLIC intermediates, *SILYL ethers, *REARRANGEMENTS (Chemistry), *ELECTROPHILIC addition reactions, *SPIRO compounds, *PROPARGYL alcohol
Abstract

A series of β-propargyl spirocyclic ketones is prepared by treatment of crude Co-complexed propargylic acetates with a Lewis acid followed by reaction of resulting intermediate propargylic cations with cyclic allylic silyl ethers and a subsequent decomplexation. [ABSTRACT FROM AUTHOR]

Published
2014
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3. ChemInform Abstract: Copper-Catalyzed Tandem Trifluoromethylation/Semipinacol Rearrangement of Allylic Alcohols.

Author

Chen, Zhi‐Min, Bai, Wei, Wang, Shao‐Hua, Yang, Bin‐Miao, Tu, Yong‐Qiang, and Zhang, Fu‐Min

Subjects
*COPPER catalysts, *METHYLATION, *PINACOL rearrangement, *ALLYL alcohol, *ALKENES, *CHEMICAL bonds, *KETONE derivatives
Abstract

The title reaction is valuable for the difunctionalization of alkenes through simultaneous construction of a C-CF3 bond and a quaternary carbon center, and could provide a straightforward strategy for the preparation of α-quaternary β-trifluoromethyl ketone derivatives. [ABSTRACT FROM AUTHOR]

Published
2014
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4. ChemInform Abstract: Total Syntheses of the Tetracyclic Cyclopiane Diterpenes Conidiogenone, Conidiogenol, and Conidiogenone B.

Author

Hou, Si‐Hua, Tu, Yong‐Qiang, Wang, Shuang‐Hu, Xi, Chao‐Chao, Zhang, Fu‐Min, Wang, Shao‐Hua, Li, Yan‐Tao, and Liu, Lin

Subjects
*CHEMICAL synthesis, *DITERPENES, *TERPENES
Abstract

The total synthesis of the cyclopiane class tetracyclic diterpene conidiogenone B (IV) is accomplished in 25 steps involving the highly efficient construction of both ring C and the quaternary center shared by rings A and C by one-step regioselective and diastereoselective cycloenlargement in form of a semipinacol-type rearrangement as key feature. [ABSTRACT FROM AUTHOR]

Published
2016
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5. ChemInform Abstract: Catalytic Asymmetric Construction of α-Quaternary Cyclopentanones and Its Application to the Syntheses of (-)-1,14-Herbertenediol and (-)-Aphanorphine.

Author

Zhu, Dao‐Yong, Xu, Ming‐Hui, Tu, Yong‐Qiang, Zhang, Fu‐Min, and Wang, Shao‐Hua

Subjects
*ASYMMETRIC synthesis, *CYCLOPENTANONES, *CYCLOPENTANE derivatives, *REARRANGEMENTS (Chemistry), *PHASE-transfer catalysis
Abstract

The title reaction is based on an efficient semipinacol rearrangement of β-aryl substituted olefinic aldehydes which provides the products in high yields and with very high enantioselectivities. [ABSTRACT FROM AUTHOR]

Published
2016
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6. ChemInform Abstract: Organocatalytic Asymmetric Tandem Nazarov Cyclization/Semipinacol Rearrangement: Rapid Construction of Chiral Spiro[4.4]nonane-1,6-diones.

Author

Yang, Bin‐Miao, Cai, Pei‐Jun, Tu, Yong‐Qiang, Yu, Zhi‐Xiang, Chen, Zhi‐Min, Wang, Shuang‐Hu, Wang, Shao‐Hua, and Zhang, Fu‐Min

Subjects
*SPIRO compounds, *RING formation (Chemistry), *PINACOL rearrangement
Abstract

Up to four consecutive stereocenters are successfully constructed in excellent enantioselectivities. [ABSTRACT FROM AUTHOR]

Published
2015
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7. ChemInform Abstract: Gold(I)/Copper(II)-Cocatalyzed Tandem Cyclization/Semipinacol Reaction: Construction of 6-Aza/Oxa-Spiro[4.5]decane Skeletons and Formal Synthesis of (.+-.)-Halichlorine.

Author

Zhu, Dao‐Yong, Zhang, Zhen, Mou, Xue‐Qing, Tu, Yong‐Qiang, Zhang, Fu‐Min, Peng, Jin‐Bao, Wang, Shao‐Hua, and Zhang, Shu‐Yu

Subjects
*SPIRO compounds, *CHLORINE compounds, *RING formation (Chemistry)
Abstract

The formal synthesis of halichlorine (XII) has been conducted via intermediate (XI) (1.5% overall yield over 11 steps) starting from compound (X). [ABSTRACT FROM AUTHOR]

Published
2015
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8. ChemInform Abstract: Efficient Oxa-Diels-Alder/Semipinacol Rearrangement/Aldol Cascade Reaction: Short Approach to Polycyclic Architectures.

Author

Peng, Jin‐Bao, Qi, Yue, Jing, Ze‐Ran, Wang, Shao‐Hua, Tu, Yong‐Qiang, Zhu, Dao‐Yong, and Zhang, Fu‐Min

Subjects
*DIELS-Alder reaction, *POLYCYCLIC compounds, *ELECTROPHILES
Abstract

A novel carbon electrophile induced intermolecular oxa-Diels-Alder/semipinacol rearrangement/aldol cascade reaction of allylic silyl ether with β,γ-unsaturated α-ketoester is developed under the promotion of SnCl4. [ABSTRACT FROM AUTHOR]

Published
2015
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9. ChemInform Abstract: A Mn(III)/TEMPO-co-Mediated Tandem Azidation-1,2-Carbon Migration Reaction of Allylic Silyl Ethers.

Author

Chen, Zhi‐Min, Zhang, Zhen, Tu, Yong‐Qiang, Xu, Ming‐Hui, Zhang, Fu‐Min, Li, Chen‐Chen, and Wang, Shao‐Hua

Subjects
*AZIDATION, *ETHERS, *ALKENES
Abstract

The title reaction enables the difunctionalization of unactivated alkenes such as (I) and (III) through simultaneous construction of an alkyl azide and an all-carbon quaternary centre. [ABSTRACT FROM AUTHOR]

Published
2015
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11. ChemInform Abstract: Direct Syntheses of Spiro- and Fused-Hydrofurans by a Tunable Tandem Semipinacol Rearrangement/Oxa-Michael Addition Protocol.

Author

Li, Bao‐Sheng, Liu, Wen‐Xing, Zhang, Qing‐Wei, Wang, Shao‐Hua, Zhang, Fu‐Min, Zhang, Shu‐Yu, Tu, Yong‐Qiang, and Cao, Xiao‐Ping

Subjects
*CHEMICAL equations, *FURANS
Abstract

The article presents steps of the chemical equations involved in the direct syntheses of spiro- and fused-hydrofurans.

Published
2013
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