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Synfacts 2011(6): 0609-0609  
DOI: 10.1055/s-0030-1260410
Synthesis of Materials and Unnatural Products
© Georg Thieme Verlag Stuttgart ˙ New York

Greener 1,1-Difluoroallenes

Contributor(s): Timothy M. Swager, Olesya Haze
K. Oh, K. Fuchibe, J. Ichikawa*
University of Tsukuba, Japan
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Publication History

Publication Date:
19 May 2011 (online)

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Significance

1,1-Difluoroallenes 3 are efficiently prepared in a two-step protocol from commercially available 1,1,1-trifluoro-2-iodoethane (1). A previously developed route to these highly functional allenes has recently become non-viable, because the starting material (1,1-dibromo-2,2-difluoro­ethene) has been banned due to its ozone depleting potential.