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Publication 105
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P. Müller, N. Pautex,
“Generation and Trapping of Cyclopropenes from 2-Alkoxy-1,1-dichlorocyclopropanes”
Helv. Chim. Acta 1991, 74, 55-64.
In presence of crown ether, 2-alkoxy-1,1-dichlorocyclopropanes react with t-BuOK/THF preferentially via ring opening to 2-chloroalk-2-en-1-ones and alkynones or to chlorocyclopropenes. The latter may be intercepted with 1,3-diphenylisobenzofuran, but in the absence of trapping agent, the rearrangement to vinylcarbenes does not occur.
DOI : 10.1002/hlca.19910740108
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