PORCESS FOR THE PREPARATION OF -CHLORINATED CHLOROFORMATES

摘要

Alpha-chlorinated chloroformates of formula (I) are prepd. by reacting aldehyde(R(CHO)n) with trichloromethyl derivs. i.e. trichloromethyl chloroformate and di(trichloromethyl)carbonate in the presence of compds. (can be sepg. a pair of ion, directly or indirectly). R=H, substd. (or unsubstd.) hetero cyclic or aliphatic(or aromatic) hydrocarbon; n is integer. The referred compds. are pyridine substd. amide and 4-substd. urea(thio), are added by 0.5-50mol.% esp. 2-7 mol.% to aldehyde.