公开(公告)号：DE2057955A1

公开(公告)日：1972-06-08

申请号：DE2057955

申请日：1970-11-25

Applicant: BASF AG

Inventor： HERTL OTTO DR ,  SCHLECHT HELMUT DR-ING ,  DATOW JOACHIM DR

IPC: C07C17/16 ,  C07C17/363 ,  C07C68/02

Abstract: 2-Chloro-3-butyne, which is of use as an intermediate for synthetic resins, plastics and plant-protection agents (e.g. herbicides), is produced in improved yields and purity by reacting 1-butyn-3-ol with COCl2 in the presence of N,N-dialkyl carboxylic acid amide catalysts (pref. dimethylformamide), the reaction being carried out in two stages in the first of which 1-butyn-3-ol and COCl2 are reacted at 25 degrees C to form 1-butyn-3-yl chloroformate and in the second of which the reaction mixt. is heated at >60 degrees C to form the desired 2-chloro-3-butyne.