Abstract: | The perchlorovinylcarbene adducts of ethylene and propylene served as precursors toa wide spectrum of 1’-substituted cycllorpropylacetylenes 4, 8 and 9, which are versatile polyfunctional molecules. E.g., the acetylenic ester 4c underwent cycloaddition to1,3-dienes giving otherwise unaccessible compounds. |