申请人:E. I. Du Pont de Nemours & Company
公开号:US03963715A1
公开(公告)日:1976-06-15
Tetracyanopyrazine reacts with aromatic amines to give products of the formula ##SPC1## Wherein R.sup.1 and R.sup.2, alike or different, are alkyl of 1-12 carbon atoms, cycloalkyl of 3-7 carbon atoms, phenyl, p-(lower alkyl)-phenyl, p-(lower alkoxy)phenyl, p-(lower alkylthio)phenyl, p-chlorophenyl, p-bromophenyl, Aralkyl, aroxyalkyl, aroyloxyalkyl, acyloxyalkyl and trifluoroacetoxyalkyl each of up to 15 carbon atoms, and wherein aryl is phenyl substituted with up to 2 lower alkyl groups, and with the proviso that the alkylene group of aroyloxyalkyl, acyloxyalkyl and trifluoroacetoxyalkyl is at least 2 carbon atoms in length; R.sup.3 is hydrogen, lower alkyl, alkoxy or alkylthio of 1-6 carbons. The cyano groups of the pyrazine ring can be converted to acid, ester or amide groups by conventional reactions. The compounds are useful as dyes and pigments.
四氰基吡嗪与芳香胺反应,得到式为##SPC1##的产物,其中R.sup.1和R.sup.2,相同或不同,为1-12碳原子的烷基,3-7碳原子的环烷基,苯基,对-(低烷基)-苯基,对-(低烷氧基)苯基,对-(低烷硫基)苯基,对-氯苯基,对-溴苯基,芳基烷基,芳氧基烷基,芳羰氧基烷基和三氟乙酰氧基烷基,每个烷基长度最多为15个碳原子,其中芳基是苯基,取代有最多2个低烷基,且芳氧基烷基,芳羰氧基烷基和三氟乙酰氧基烷基的烷基长度至少为2个碳原子;R.sup.3为氢,低烷基,烷氧基或烷硫基,碳原子数为1-6。吡嗪环的氰基可以通过常规反应转化为酸,酯或酰胺基团。这些化合物可用作染料和颜料。