Author
Zhang Chenyun
Bio: Zhang Chenyun is an academic researcher from East China Normal University. The author has contributed to research in topics: Allene & Derivative (chemistry). The author has an hindex of 2, co-authored 4 publications receiving 33 citations.
Papers
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TL;DR: An efficient cascade reaction of propargyl amines with AgSCF3 and KBr is developed, affording allenyl thiocyanates at room temperature in high yields via a "one-pot" three-step process.
28 citations
TL;DR: An FeCl3-catalyzed allenic Claisen rearrangement/regio- and chemoselective aerobic dehydrogenative cyclization domino reaction is developed, providing a wide range of 2-aryl/alkyl, 3-(substituted-vinyl)naphtho[2,1- b]furans in high yields at 95-130 °C in an atom- and step-economic fashion.
16 citations
Patent•
21 Aug 2018
TL;DR: In this article, an allene thiocyanide derivative and a synthesis method of the derivative were presented. But the synthesis method was based on a two-step tandem reaction at room temperature to obtain the derivative, which has the advantages of simple operation, safety, high efficiency, mild condition and the like.
Abstract: The invention discloses an allene thiocyanide derivative and a synthesis method thereof. Propargylamine and trifluoromethylthio silver are used as raw materials, a haloid is used as an additive, an organic solvent is used as a solvent, and a two-step tandem reaction is carried out at room temperature to obtain the allene thiocyanide derivative. The synthesis method of the allene thiocyanide derivative has the advantages of simple operation, safety, high efficiency, mild condition and the like.
2 citations
Patent•
17 Aug 2018
TL;DR: In this article, an allene fluoroform thioether derivative and a synthetic method of the derivative were presented. But the method was performed at room temperature, and the reaction is performed at the temperature of 80 DEG C.
Abstract: The invention discloses an allene fluoroform thioether derivative and a synthetic method thereof. Propynylamine and fluoroform sulfur silver serve as raw materials, haloid serves as an additive, organic solvents serve as solvents, reaction is performed at room temperature, the fluoroform sulfur silver serve as the raw material is added after two-step cascade reaction, di-tert-butyl peroxide serving as an oxidizing agent is added, reaction is performed at the temperature of 80 DEG C, and the allene fluoroform thioether derivative is prepared by one-pot three-step reaction. The synthetic methodof the allene fluoroform thioether derivative can achieve the advantages of high chemical selectivity and position selectivity, simplicity in operation, safety, high efficiency and the like by condition control.
1 citations
Cited by
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TL;DR: The visible light induced C-H bond thiocyanation on the α-site of tertiary enaminones has been realized under metal-free, photocatalytic conditions in the presence of Rose Bengal, which enables the synthesis of thuocyanated alkene derivatives and chromones using NH4SCN as the thiOCyano source under an aerobic atmosphere.
Abstract: The visible light induced C–H bond thiocyanation on the α-site of tertiary enaminones has been realized under metal-free, photocatalytic conditions in the presence of Rose Bengal, which enables the...
113 citations
TL;DR: This review describes the progress of the last decade on the synthesis of substituted benzofurans, which are useful scaffolds for the synthesisof numerous natural products and pharmaceuticals, with transition-metal catalysis or metal-free processes.
Abstract: This review describes the progress of the last decade on the synthesis of substituted benzofurans, which are useful scaffolds for the synthesis of numerous natural products and pharmaceuticals. In particular, new intramolecular and intermolecular C–C and/or C–O bond-forming processes, with transition-metal catalysis or metal-free are summarized. (1) Introduction. (2) Ring generation via intramolecular cyclization. (2.1) C7a–O bond formation: (route a). (2.2) O–C2 bond formation: (route b). (2.3) C2–C3 bond formation: (route c). (2.4) C3–C3a bond formation: (route d). (3) Ring generation via intermolecular cyclization. (3.1) C7a-O and C3–C3a bond formation (route a + d). (3.2) O–C2 and C2–C3 bond formation: (route b + c). (3.3) O–C2 and C3–C3a bond formation: (route b + d). (4) Benzannulation. (5) Conclusion.
28 citations
TL;DR: AgSCF3 reacts with secondary/primary amines under KBr at room temperature, affording quantitative thiocarbamoyl fluorides/isothiocyanates, which feature late-stage application.
27 citations
22 citations
TL;DR: The developed synthetic procedures are versatile, robust, and easily scalable for the synthesis of 3-difluoromethyl benzoxazole-2-thione derivatives, some of which have shown insecticidal activities.
21 citations