ALKYNYLHALOCARBENES. 1. GENERATION OF ALKYNYLCHLORO- AND ALKYNYLBROMOCARBENES FROM ALKYNYLCHLOROBROMO- AND ALKYNYLDIBROMOMETHANES, THEIR MULTIPLICITY AND PHILICITY

Article abstract of DOI:10.1007/BF00961044

The action of t-BuOK on alkynyldihalomethanes RC<*>CCHBrX (I, R = Me, t-Bu, Ph; X = Br, Cl) in pentane at -20 to 0 deg C generates the corresponding alkynylhalocarbenes RC<*>C<*>X (II; X = Br, Cl) which in the presence of olefins give alkynylhalocycloprop