The direct alkynylation of the electrophilic gem-difluorinated propene derivative (I) is achieved via a simple allylic substitution reaction. In the case of the 1,1-difluorinated propene derivative (IV), which has two electrophilic sites, the regioisomers (VI) are obtained. -(HWANG, J. H.; HONG, Y. Y.; YANG, E. J.; JEONG*, I. H.; Bull. Korean Chem. Soc. 32 (2011) 2, 405-406, http://dx.doi.org/10.5012/bkcs.2011.32.2.405 ; Dep. Chem., Yonsei Univ., Wonju 220-710, S. Korea; Eng.) -H. Hoennerscheid 24-082
Allylic defluorination is observed when title compounds of type (IV) or (XIV) are reacted with thiolates or alkoxides formed in situ from (V), or with Grignard reagents (VIII) or (XI), or when reacted with t‐butylamine (XI).
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