S \s \N/ Now we have found that dyes of the above formula can be prepared by condensing a quater- coHa nary salt of a 2-substituted mercapto-pyridine or 5-(2-ethyl-l-benzothiazylidene) -3-phenylrhodanin 35 quinoline with a heterocyclic compound, contain- The condensations are effected by heati ing a nuclear methylene group adjacent to a nu- components in alcohol or other suitable clear carbonyl or thiocarbonyl group. Such dyes were prepared by condensing 3-phenylrhodanine ethiodide of 1-phenylthiobenr a quaternary salt of a 2-halogeno-pyridine, a 2- o halogeno-quinoline or a 2-halogeno-naphthoquin- / s\ oline with a rhodanine or a 2,4,6-triketohexahy- CHs-N 30 dropyrimidine, in the presence of an acid binding I c=c cO5SHagent. ![]() Brooker, dyes of the following gen- 3-phenylrhodanine ethiodide of 2-phenylthioqui eral formula are described: o I/' I, I A=-C-C=-N-R OCs-0 CC CH~SH I 15 wherein A represents oxygen or sulfur, R repre- \s/ sents an alkyl group and Y and Z represent the CiHa non-metallic atoms necessary to complete a five- 5-(1-ethyl-2-quinolylidene)-3-phenvlrhodanine Specifically described are dyes wherein A repre- o 20 sents oxygen, Z represents the non-metallic atoms -/ / necessary to complete a five-membered rhodanine OHS-N nucleus or a six-membered 2,4,6-triketohexahy- 1 CHa2 C6OaS-0 dropyrimidine nucleus and Y represents the non- s-c\/ \ / metallic atoms necessary to complete a six-mem25, bered pyridine, quinoline or naphthoquinoline csH1 I nucleus. \ / SIn the above-referred to copending application s C2H5/ of Leslie G. Brooker in his copending CaHs-N application Serial No. ![]() A num- 11 ber of dyes of the merocyanine class have been / 0 described by Leslie G. 260-240) This invention relates to dyes of a new class Our new process can be illustrated by t related in certain respects to dyes of the cyanine lowing specific reactions: class.- It has recently been proposed to call the o dyes of this new class merocyanine dyes. J., a corporation of New Jersey No Drawing. Y., assignors, by mesne assignments, to Eastman Kodak Company, Jersey City, N. UNITED STATES PATENT OFFICE 2,161,331 MEROCYANINES AND A PROCESS FOR THE PREPARATION THEREOF Leslie G.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |