Process for preparing isocyanates from urethanes by a novel tech

Details Process for preparing isocyanates from urethanes by a novel tech Process for preparing isocyanates from urethanes by a novel tech

1994-02-09

1995-10-10

Dees, Jose G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Isocyanate esters

C07C26304

Patent

active

054572290

ABSTRACT:
Urethanes are converted to isocyanates by reaction with a chloro-, bromo- or iodo-borane compound and a tertiary amine in a nonpolar solvent. With the preferred borane compound, chlorocatecholborane, the reaction goes speedily and under gentle conditions to give the isocyanate in good yield. Also formed is a borate which can be readily converted to the borane compound, for reuse.

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