Abstract

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

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