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Start Over Author "Zhang, Xiaoke" Journal advanced synthesis & catalysis
8 results on '"Zhang, Xiaoke"'

4. Strategy to Construct 1,2,3‐Triazoles by K2CO3‐Mediated [4+1] Annulation Reactions of N‐Acetyl Hydrazones with Bifunctional Amino Reagents.

Author

Zhang, Xiaoke, Pan, Yang, Wang, Haibo, Liang, Chong, Ma, Xiaofeng, Jiao, Wei, and Shao, Huawu

Subjects
*ANNULATION, *HYDRAZONES, *ORGANOCATALYSIS, *TRIAZOLE derivatives, *AZIDES, *OXIDIZING agents, *HYDRAZONE derivatives
Abstract

K2CO3‐mediated [4+1] annulation reactions of N‐acetyl hydrazones with bifunctional amino reagents are described, which provide an environmental‐friendly strategy to construct 1,2,3‐triazoles that does not employ metals, azides, organocatalysis, or oxidants. A series of substituted 1,2,3‐triazole derivatives was prepared with good yields. [ABSTRACT FROM AUTHOR]

Published
2021
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5. An Effective Method for the Synthesis of 1,3‐Dihydro‐2H‐indazoles via N‐N Bond Formation.

Author

Zhang, Xiaoke, Pan, Yang, Liang, Peng, Ma, Xiaofeng, Jiao, Wei, and Shao, Huawu

Subjects
*RING formation (Chemistry), *CARBAMATES, *ANNULATION
Abstract

The [4+1] cycloaddition reaction of bifunctional amino reagents has been achieved with in situ formed aza‐ortho‐quinone methides. Specifically, N‐(tosyloxy)carbamates were used as an N1 synthon and bifunctional amino reagents for this transformation, which provides a metal‐free, catalyst‐free, and oxidant‐free strategy to form nitrogen‐nitrogen bonds. [ABSTRACT FROM AUTHOR]

Published
2019
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7. Oxadiazepine Synthesis by Formal [4+3] Cycloaddition of o‐Chloromethyl Arylsulfonamides with Nitrones Promoted by NaHCO3.

Author

Zhang, Xiaoke, Pan, Yang, Liang, Peng, Pang, Lu, Ma, Xiaofeng, Jiao, Wei, and Shao, Huawu

Subjects
*DIAZEPINES, *RING formation (Chemistry), *SULFONAMIDES, *NITRONES, *AMIDES, *CHEMICAL yield
Abstract

Abstract: An effective and facile method for the synthesis of highly substituted 1,2,3,5‐tetrahydrobenzo[e][1,2,4]‐oxadiazepines is described. A formal [4+3] cycloaddition of N‐(2‐(chloromethyl) phenyl) amides with nitrones afforded benzo[e][1,2,4]‐oxadiazepine derivatives with high atom economy and excellent yields (up to 97%). [ABSTRACT FROM AUTHOR]

Published
2018
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8. Oxadiazepine Synthesis by Formal [4+3] Cycloaddition of o‐Chloromethyl Arylsulfonamides with Nitrones Promoted by NaHCO3.

Author

Zhang, Xiaoke, Pan, Yang, Liang, Peng, Pang, Lu, Ma, Xiaofeng, Jiao, Wei, and Shao, Huawu

Subjects
DIAZEPINES, RING formation (Chemistry), SULFONAMIDES, NITRONES, AMIDES, CHEMICAL yield
Abstract

Abstract: An effective and facile method for the synthesis of highly substituted 1,2,3,5‐tetrahydrobenzo[e][1,2,4]‐oxadiazepines is described. A formal [4+3] cycloaddition of N‐(2‐(chloromethyl) phenyl) amides with nitrones afforded benzo[e][1,2,4]‐oxadiazepine derivatives with high atom economy and excellent yields (up to 97%). [ABSTRACT FROM AUTHOR]

Published
2018
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