申请人:BASF Aktiengesellscahft
公开号:US04257974A1
公开(公告)日:1981-03-24
.alpha.,.beta.-Dihaloalkyl isocyanates and a process for the preparation of such compounds by reacting .alpha.,.beta.-unsaturated alkyl isocyanates with halogen in the presence of an organic solvent which is inert under the reaction conditions, at from -35.degree. to +90.degree. C. The .alpha.,.beta.-dihaloalkyl isocyanates thus obtainable correspond to the formula ##STR1## where R.sup.1, R.sup.2 and R.sup.3 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 R.sup.1 and R.sup.2 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 valuable intermediates for the preparation of dyes, surface-coating intermediates, crop protection agents and drugs.
.alpha.,.beta.-二卤代烷基异氰酸酯及其制备方法,通过在惰性有机溶剂存在下,在-35℃至+90℃的反应条件下,将.alpha.,.beta.-不饱和烷基异氰酸酯与卤素反应制备而成。因此获得的.alpha.,.beta.-二卤代烷基异氰酸酯对应于以下式子:##STR1##其中,R1,R2和R3相同或不同,每个都是氢、1至10个碳原子的饱和脂肪基、3至12个碳原子的环脂肪基、7至11个碳原子的芳基脂肪基或6至10个碳原子的芳香基,或者R1和R2与它们所在的碳原子一起作为取代基存在的环烷基,具有3至7个环元素,X为卤素。这些化合物是制备染料、表面涂料中间体、农药和药物的有价值的中间体。