Showing papers on "Anthrone published in 1982"
TL;DR: The tautomeric equilibrium between anthrone and anthranol has been shown to play an important role in photochemistry of this system as mentioned in this paper, and the triplet spectrum of Anthranol shows a maximum at 430 nm, while the triplets state of Anthrone resembles typical aromatic ketones with λmax ≈ 580 nm.
14 citations
1 Jan 1982
TL;DR: In this paper, the thermal properties of six bisdichloromaleimides with different aromatic structures are investigated by using IR spectroscopy and reduced viscosity measurements.
Abstract: The characteristics of six bisdichloromaleimides with different aromatic structures are investigated The compounds are prepared by reacting 2,3-dichloromaleic anhydride with 1,5-diaminonaphthaline; bis (m-aminophenyl)methylphosphine oxide; 2,5-bis (p-aminophenyl) 1,3,4-oxadiazole; 3,3-bis (p-aminophenyl)phthalide; 9,9-bis (p-aminophenyl) fluorene; 10,10-bis (p-aminophenyl)anthrone Dynamic thermogravity is used to determine the effect of structural differences on the thermal characteristics of these compounds These compounds are polymerized by nucleophilic displacement of chlorine with 9,9-bis (p-aminophenyl)fluorene The polymers are then characterized by IR spectroscopy and reduced viscosity measurements The anaerobic char yields of these polymers at 800 C are found to range from 55-60% A complete loss of weight is observed between 600-650 C in the presence of air In addition, the thermal cross-linking of these polymers is investigated
7 citations
Patent•
14 Sep 1982
4 citations
TL;DR: In this paper, it is shown that reduction of anthraquinone to its anthrone oxidation state results in benzanthrone formation during pulping, and that the oxanthrone adduct affords practically none of thi3 product.
Abstract: Anthrahydroquinone and anthrone readily react with stabilised quinone methides in alkaline solution to give 10-substituted oxan thrones and an thrones respectively. Similarly, reaction of a vinyl-substituted quinone methide gives the corresponding anthrone, both as the keto and enol adducts, and the substituted oxanthrone. Whilst both forms of the substituted anthrone can be partially converted to 3-arylbenzanthronea analogous to 3-guaiacylbenzanthrone formed during pulping, the oxanthrone adduct affords practically none of thi3 product. This indicates that it is reduction of anthraquinone to its anthrone oxidation state which results in benzanthrone formation during pulping.
3 citations
TL;DR: In this paper, the 1H nmr spectra of fluorene, 2,7-dibromofluorene and anthrone were analyzed and the benzylic couplings in these compounds were compared with those in indene and toluene.
Abstract: The analyses of the 1H nmr spectra of fluorene, 2,7-dibromofluorene, and anthrone are reported. The benzylic couplings in these compounds are compared with those in indene and toluene. It is argued...
2 citations
Patent•
27 Aug 1982
TL;DR: A heat denaturing deoxyribonucleic acid MD-011 is described in this paper, which is an antitumor agent that is insoluble in water, ethanol, ether, acetone, etc.
Abstract: NEW MATERIAL:A heat denaturing deoxyribonucleic acid MD-011. Elementary analysis %: C, 25.57-29.75; H, 3.80-4.75; N, 12.67-13.47; P, 7.30-7.91; Na, 8.12-11.59. Molecular weight: 30,000-1,000,000. Soluble in water and insoluble in ethanol, ether, acetone, etc. Negative to the orcinol, ninhydrin and anthrone reactions, and positive to the diphenylamine reaction. pH of the aqueous solution: 6.5-7.5. While powder. Base composition %: Guanine, 30.4; adenine, 16.9; cytosine, 30.8; thymine, 21.9. Loses the antitumor activity with deoxyribonuclease I, and no change with ribonuclease T2. Melting point and transition temperature: Indefinite. USE:An antitumor agent. PROCESS:A bacterium, e.g. bovine tubercle bacillus (ATCC19015), of the genus Mycobacterium is crushed and centrifuged to give an extract. A nucleic acid fraction of the resultant extract is then heat-treated.
1 citations
Patent•
[...]
16 Jul 1982
TL;DR: In this paper, a microorganism, e.g., Streptomyces ablus AJ9003 (FERM-P No. 5431), which belongs to the genus Streptococcus and has the ability to produce the antibiotic AN-1 is cultivated under aerobic conditions, and the aimed protein AN- 1 is obtained from the culture fluid by separating and purifying through precipitation with a solvent, such as acetone.
Abstract: NEW MATERIAL:Protein AN-1. Molecular weight: 12X10 (by the gel filtration method with Biogel P-30 ). White amorphous powder. Positive to the ninhydrin and the biuret reactions; negative to the anthrone and the Blix reactions. (containing no hexose and hexosamine). Solubility: soluble in water; insoluble in methanol, etc. Elementary analysis: N, 14.39%; C, 48.19%; H, 6.56%; S, 2.00%. Amino acid composition; lysin, 5.66%; arginine, 5.64%; threonine, 6.86%. USE:An anticancer agent and a nonantimicrobial protein. PROCESS:A microorganism, e.g. Streptomyces ablus AJ9003 (FERM-P No. 5431), which belongs to the genus Streptomyces and has the ability to produce the antibiotic AN-1 is cultivated under aerobic conditions, and the aimed protein AN-1 is obtained from the culture fluid by separating and purifying through precipitation with a solvent, e.g. acetone.
Patent•
27 Sep 1982
TL;DR: A phsiologically active substance K-26 having the following properties: White amorphous powder and an acidic aqueous solution thereof Without a definite melting point up to 300 degC Specific rotatory power[alpha]D = -48 (C=01, H2O) Readily soluble in alkaline water, soluble in water, slightly soluble in methanol and ethanol, and insoluble in ethyl acetate, chloroform, hexane, etc Positive to the Rydon-Smith reaction, and negative to the ninhydrin, anthrone, an
Abstract: NEW MATERIAL:A phsiologically active substance K-26 having the following properties: White amorphous powder and an acidic aqueous solution thereof Without a definite melting point up to 300 degC Specific rotatory power[alpha]D = -48 (C=01, H2O) Readily soluble in alkaline water, soluble in water, slightly soluble in methanol and ethanol, and insoluble in ethyl acetate, chloroform, hexane, etc Positive to the Rydon-Smith reaction, and negative to the ninhydrin, anthrone, aniline, diphenylamin reactions, etc The constituent amino acids: isoleucine, tyrosine and unidentified amino acids Infrared spectrum as shown in the figure USE:A hypotensive agent PROCESS:A microorganism, eg a strain capable of producing K-26 (FERM-P No5889), belonging to actinomyces, is cultivated at 25-40 degC at about a neutral pH
TL;DR: In this article, a mechanism for the formation of 3-guaiacylbenzanthrone in anthraquinone pulping cooks is investigated and discussed, and some implications for AQ loss and recoverability are also briefly discussed.
Abstract: A mechanism previously proposed for the formation of 3-guaiacylbenzanthrone in anthraquinone pulping cooks is investigated and discussed. Some implications for AQ loss and recoverability are also briefly discussed.
Patent•
28 May 1982
TL;DR: A compound shown by the formula of C38H63NO12 as mentioned in this paper is an antibacterial agent against Gram-positive and Gram-negative bacteria, mycoplasma, etc.
Abstract: NEW MATERIAL:A compound shown by the formula. Exhibiting the following physical and chemical properties. White crystal. Melting point: 164.5-168 deg.C; [alpha]D =-6.6 (C=2, methanol). Elemental analysis %: C 63.03, H 8.80, and N 1.84. Molecular weight: 725. (resulting from electron impact mass spectrum). Molecular formula: C38H63NO12. Soluble in lower alcohol, ester, ketone, benzene, weakly acidic water, insoluble in weakly alkali water, petroleum ether, n-hexane, etc. Positive in molish, anthrone, conc. sulfuric acid reaction, and negative in biuret, ninhydrin reaction, etc. USE:An antibacterial agent against Gram-positive and Gram-negative bacteria, mycoplasma, etc. PROCESS:For example, a bacterium, e.g., Stretomyces fradiae YT-3927(FERM- P5758), is cultivated preferably under aerobic conditions, at 25-35 deg.C in a pH of approximately neutrality of 6-8 for 2-12 days.