Preparation of metal-free phthalocyanines

Details Preparation of metal-free phthalocyanines Preparation of metal-free phthalocyanines

1994-12-16

1996-10-29

Shah, Mukund J.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

540129, 540131, 540136, C09B 4730

Patent

active

055697585

ABSTRACT:
A process for preparing metal-free phthalocyanines which can carry up to 16 halogen atoms, cyano groups, carboxyl groups, sulfo groups, C.sub.1 -C.sub.18 -alkyl groups and/or aryl radicals as substituents by reductive cyclization of ortho-phthalodinitrile substituted ortho-phthalodinitriles or mixtures thereof comprises effecting the cyclization in C.sub.2 -C.sub.4 -alkylene monoglycols, oligoglycols or polyglycols, their mono-C.sub.1 -C.sub.4 -alkyl or -aryl ethers or their mixtures in the presence of an aromatic compound of the formula I ##STR1## where the substituents X can be identical or different and each denotes hydroxyl, mercapto, amino or C.sub.1 -C.sub.6 -alkylamino, the substituents Y can likewise be identical or different and each denotes halogen, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy or C.sub.1 -C.sub.6 -alkoxycarbonyl, m is from 1 to 4 and n is from 0 to 5, subject to the proviso that m+n .ltoreq.6, and the benzene ring A can be fused to a further benzene ring,
and of an inorganic base.

REFERENCES:
patent: 2382441 (1945-08-01), Reynolds et al.
patent: 2485168 (1949-10-01), Rintelman
patent: 3357989 (1967-12-01), Byrne et al.
patent: 4145264 (1979-03-01), Thoma et al.
patent: 5367069 (1994-11-01), Beck et al.
A New Polymorph Of Metal-Free Phthalocyanine By Shigemasa Takano, et al. Chemistry Letters, pp. 2037-2040, 1984. The Chemical Society of Japan.
Database WPI, Derwent Publications, AN 85-155940, JP-A-6 087 288, May 16, 1985.

Affiliated with

Also associated with

Rating

Preparation of metal-free phthalocyanines does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Preparation of metal-free phthalocyanines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of metal-free phthalocyanines will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1786426