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Dianjun Chen

Texas Tech University

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Featured researches published by Dianjun Chen.

Tetrahedron-asymmetry | 2003

Asymmetric synthesis of chiral β-iodo Baylis–Hillman esters using MgI2 as promoter via a one-pot three-component reaction

Han-Xun Wei; Dianjun Chen; Xin Xu; Guigen Li; Paul W. Paré

Abstract An asymmetric synthesis of β-iodo-α-(hydroxyalkyl)acrylates has been developed involving conjugate addition of I − to menthyl propiolates to give β-iodo allenolate intermediates which undergo 1,2-addition to form β-iodo Baylis–Hillman products. Modest diastereoselectivities (37–58% de) and excellent yields (80–87%) were obtained when (1 R ,2 S ,5 R )-(−)-menthol was used as a chiral auxiliary. The two diastereoisomers of the product were separated by silica gel chromatography to give diastereomerically pure products.

Journal of Organic Chemistry | 2003

Direct Electrophilic Diamination of Functionalized Alkenes without the Use of Any Metal Catalysts

Dianjun Chen; Cody Timmons; Han-Xun Wei; Guigen Li

European Journal of Organic Chemistry | 2004

Regio- and Stereoselective Copper-Catalyzed Synthesis of Vicinal Haloamino Ketones from α,β-Unsaturated Ketones

Dianjun Chen; Cody Timmons; Steven Chao; Guigen Li

Organic Letters | 2005

Functionalization of α,β-Unsaturated Esters and Ketones: A Facile and Highly Stereoselective One-Pot Approach to N-Protected α,β-Dehydroamino Acid Derivatives

Dianjun Chen; Li Guo; Junying Liu; Sameer Kirtane; John F. Cannon; Guigen Li

Journal of Organic Chemistry | 2003

N,N-dichloro-2-nitrobenzenesulfonamide as the electrophilic nitrogen source for direct diamination of enones.

Wei Pei; Han-Xun Wei; Dianjun Chen; and Allan D. Headley; Guigen Li

Organic Letters | 2003

Asymmetric halo aldol reaction (AHA).

Guigen Li; Xin Xu; Dianjun Chen; Cody Timmons; and Michael D. Carducci; Allan D. Headley

European Journal of Organic Chemistry | 2003

The Combination of TsNH2 and NCS as Nitrogen and Chlorine Sources for Direct Diamination of Enones

Cody Timmons; Dianjun Chen; Xin Xu; Guigen Li

Tetrahedron-asymmetry | 2005

The first asymmetric catalytic halo aldol reaction of β-iodo allenoates with aldehydes by using chiral salen catalyst

Dianjun Chen; Li Guo; S. R. S. Saibabu Kotti; Guigen Li

European Journal of Organic Chemistry | 2004

The First Enantioselective Halo Aldol Reaction of Ethyl Propiolate and Aldehydes

Dianjun Chen; Cody Timmons; Junying Liu; Allan Headley; Guigen Li

Organic Letters | 2004

New Asymmetric Halo Aldol Reaction Provides a Novel Approach to Biologically Important Chiral Cyclothers and Cycloamines

Cody Timmons; Dianjun Chen; John F. Cannon; and Allan D. Headley; Guigen Li

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Guigen Li

Texas Tech University

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Cody Timmons

Texas Tech University

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Xin Xu

Texas Tech University

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Han-Xun Wei

Texas Tech University

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Junying Liu

Texas Tech University

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Li Guo

Texas Tech University

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John F. Cannon

Brigham Young University

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S. R. S. Saibabu Kotti

Texas Tech University

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Sameer Kirtane

Texas Tech University

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Allan D. Headley

Texas A

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