Isocyanato-dioxazolinones and dioxazines prodn. - from(acid salts of) amino-hydroxamic acids and phosgene or oxalyl chloride

The prodn. of isocyanato dioxazolinones or isocyanatodioxazines of formula (A) (where R is an n+m-valent aliphatic, cycloaliphatic aromatic or heterocyclic gp.; x is 1 or 2; m and n are 1, 2 3 or 4) comprises reacting the salt of an acid with an aminohydroxamic acid (III) or the free (III) of formul...

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Bibliographic Details
Main Authors MERTEN, RUDOLF., 5090 LEVERKUSEN, HOCKER, JUERGEN., 5000 KOELN
Format Patent
LanguageEnglish
German
Published 25.03.1976
Edition2
Subjects
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Summary:The prodn. of isocyanato dioxazolinones or isocyanatodioxazines of formula (A) (where R is an n+m-valent aliphatic, cycloaliphatic aromatic or heterocyclic gp.; x is 1 or 2; m and n are 1, 2 3 or 4) comprises reacting the salt of an acid with an aminohydroxamic acid (III) or the free (III) of formula (where HX is a mono- or poly-basic, inorg. or org. acid) with COCl2 or (COCl2)2 at -25 to +200 degrees C, opt. in the presence of an inert solvent. Good yields are obtd.
Bibliography:Application Number: DE19742443484