Patent ID: 6087535
Filing Date: 2000-07-11
Classification: C07B,C07C

Abstract:
A process for preparing a chloroalkyne that consists of reacting an alkynyl alcohol having the formula ##STR8## with from about 0.5 to about 5 equivalents of concentrated hydrochloric acid in the presence of from about 0.25 to about 4 equivalents of calcium dichloride dihydrate and from about 0.001 to about 0.1 equivalent of a copper(I) salt catalyst to produce a chloroalkyne having the formula ##STR9## wherein R is a hydrogen atom, alkyl, cycloalkyl, cycloalkylalkyl or aralkyl andR.sup.1 and R.sup.2 are each independently alkyl, cycloalkyl, cycloalkylalkyl, aralkyl or, together with the carbon atom to which they are attached, form cycloalkyl.