Fluorinated diisocyanates of the general structure OCN(CH2)2(CF2)n(CH2)2NCO were prepared from alpha,omega-diiodoperfluoroalkanes by insertion of ethylene into the CF2-I bond, displacement of the iodo groups with azide, reduction of the resulting azide groups to amines, and phosgenation of the diamine.
Fluorinated diisocyanates of the general structure OCN(CH2)2(CF2)n(CH2)2NCO were prepared from alpha,omega-diiodoperfluoroalkanes by insertion of ethylene into the CF2-I bond, displacement of the iodo groups with azide, reduction of the resulting azide groups to amines, and phosgenation of the diamine.