.alpha.,.beta.-dihaloalkyl isocyanates and a process for the...

Details .alpha.,.beta.-dihaloalkyl isocyanates and a process for the... .alpha.,.beta.-dihaloalkyl isocyanates and a process for the...

C - Chemistry, Metallurgy

07

C

260/455

C07C 119/042 (1980.01)

Patent

CA 1120943

O.Z. 0050/033479 Abstract of the Disclosure: .alpha.,.beta.-Dihaloalkyl isocyanates and a process for the preparation of such compounds by reacting .alpha.,.beta.-unsaturated alkyl isocynates with halogen in the presence of an organic solvent which is inert under the reaction conditions, at from -35 to +90°C. The .alpha.,.beta.-dihaloalkyl isocyanates thus obtainable corres- pond to the formula Image I where Rl, R2 and R3 are identical or different and each is hydrogen, a saturated aliphatic radical of 1 to 10 carbon atoms, a cycloaliphatic radical of 3 to 12 carbon atoms, an araliphatic radical of 7 to 11 carbon atoms or an aromatic radical of 6 to 10 carbon atoms, or Rl and R2 together with the carbon atom on which they are present as substituents are cycloalkyl of 3 to 7 ring members, and X is halogen. The compounds are valu- able intermediates for the preparation of dyes, surface- coating intermediates, crop protectlon agents and drugs.

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