A process for the preparation of a polycyclic dye of the Formula (1):
by reacting a ketal ester of the Formula (2):
with a benzofuranone of the Formula (3):
wherein:
Ring Ais unsubstituted or is substituted by from one to three groups;
Ring Bis unsubstituted, apart from the nitro group, or is substituted by one or two additional groups;
each Ris independently alkyl.
The polycyclic dyes described are useful for the coloration of synthetic textile materials especially polyesters.
一种制备式(1)多环染料的工艺:
使式(2)的缩酮酯反应:
与式 (3) 的苯并呋喃酮反应:
其中
环 A 未被取代或被一至三个基团取代;
除硝基外,环 Bis 未被取代或被一个或两个额外的基团取代;
每个 Ris 独立为烷基。
所述多环染料可用于合成纺织材料,特别是聚酯的着色。
US5214161A
申请人:——
公开号:US5214161A
公开(公告)日:1993-05-25
Conjugate addition of grignard reagents to para-substituted nitrobenzenes
作者:Stephen J. Bentley、David J. Milner
DOI:10.1016/0022-328x(93)80265-d
日期:1993.3
Nitrobenzenes bearing masked aldehyde, ketone and ketoester functions at the 4-position undergo conjugateaddition with Grignardreagents in THF at − 15°C. Sequential treatment of the 4-substituted nitrobenzenes with primary or secondary alkyl magnesium halides followed by 2,3-dichloro-5,6-dicyano-1,4-benzoquinone affords the corresponding 2-alkylated derivatives in 50–80% yields.