The reaction equation for the condensation of ethyl acetylene with formaldehyde.

The addition of formaldehyde with the formation of unsaturated alcohol occurs according to the Favorsky-Reppe reaction with the formation of pent-2-in-1-ol:

CH3CH2-C≡CH + HCHO = CH3CH2-C≡C-CH2OH

Synthesis conditions: high pressure and the presence of a catalyst – copper (I) acetylenide, СuC≡CCu.



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