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Start Over Author "Zhan-Ling Cheng" Publisher elsevier bv
2 results on '"Zhan-Ling Cheng"'

1. Difluorocarbene chemistry: synthesis of gem-difluorocyclopropenylalkynes and 3,3,3′,3′-tetrafluorobicyclopropyl-1,1′-dienes

Author

Zhan-Ling Cheng and Qing-Yun Chen

Subjects
Difluorocarbene, Chemistry, Organic Chemistry, Sonogashira coupling, Diglyme, Biochemistry, Decomposition, Inorganic Chemistry, chemistry.chemical_compound, Polymer chemistry, Anhydrous, Environmental Chemistry, Organic chemistry, Acid hydrolysis, Physical and Theoretical Chemistry
Abstract

A series of gem-difluorocyclopropenylalkynes are easily obtained in good yields by the Sonogashira reaction of 3,3-difluoro-1-iodocyclopropenes with terminal alkynes. Onto these new alkynes addition of difluorocarbene, generated from the decomposition of FSO2CF2COOTMS in diglyme in the presence of 10 mol% anhydrous NaF at 120 °C, gives 3,3,3′,3′-tetrafluorobicyclopropyl-1,1′-dienes. Acid hydrolysis of gem-difluorocyclopropenylalkynes in refluxing CH3OH affords the corresponding methoxycarbonylenynes.

Published
2005

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