Abstract
Addition of the carbonium ion to vinylidene chloride to give α-substituted acetic acid discovered by Bott1,2 has been found of wide applicability. For example, the reaction of 1-bromo-, 1-hydroxy-, or 1-acetoxy-adamantane with vinylidene chloride in concentrated sulfuric acid gives a satisfactory yield of adamanty1-(1)-Acetic acid.3,4