Rubber Chemicals Derived from Conjugate Addition. II. Synthesis of a Novel Class of Benzoquinone Diimines

Alan R. Katritzky; Herman H. Odens; Michael V. Voronkov; Charles J. Rostek; Otto W. Maender

doi:10.5254/1.3547662

Rubber Chemicals Derived from Conjugate Addition. II. Synthesis of a Novel Class of Benzoquinone Diimines

Rubber Chemistry and Technology ◽

10.5254/1.3547662 ◽

2001 ◽

Vol 74 (5) ◽

pp. 927-945 ◽

Cited By ~ 2

Author(s):

Alan R. Katritzky ◽

Herman H. Odens ◽

Michael V. Voronkov ◽

Charles J. Rostek ◽

Otto W. Maender

Keyword(s):

Conjugate Addition ◽

Oxidizing Agent ◽

Benzoquinone Diimines

Abstract Various 2-alkylthio-5-amino- and 2,5-diamino-1,4-phenylenediamines were prepared by treatment of N-(1,3-dimethylbutyl)- N′-phenyl-1,4-quinonediimine with thiols and amines using air as an oxidizing agent. Key 2-alkylthio-1, 4-benzoquinone diimines were prepared via Ag2O oxidation of the corresponding 1,4-phenylenediamines.

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Rubber Chemicals Derived from Conjugate Addition. I. Syntheses of Novel 2-Thio-5-Amino Substituted Benzoquinones

Rubber Chemistry and Technology ◽

10.5254/1.3547661 ◽

2001 ◽

Vol 74 (5) ◽

pp. 915-925 ◽

Cited By ~ 2

Author(s):

Alan R. Katritzky ◽

Herman H. Odens ◽

Michael V. Voronkov ◽

Charles J. Rostek ◽

Otto W. Maender

Keyword(s):

Conjugate Addition ◽

No Oxidation ◽

Secondary Amines ◽

Oxidizing Agent ◽

Primary And Secondary Amines ◽

Subsequent Addition

Abstract Alkylthio-substituted benzoquinones were prepared from benzoquinone and mercaptans in 50–94% yields via NaIO4 oxidation of the intermediate hydroquinones. Subsequent addition of primary and secondary amines, in the presence of air as an oxidizing agent, gave a range of 2-thio-5-amino-substituted benzoquinones. No oxidation at sulfur was detected under the described conditions.

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Triple Fixation For Electron Microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100100196 ◽

1968 ◽

Vol 26 ◽

pp. 90-91 ◽

Cited By ~ 1

Author(s):

M. A. Hayat

Keyword(s):

Electron Microscopy ◽

Endoplasmic Reticulum ◽

Electron Beam ◽

Plasma Membrane ◽

Myelin Sheath ◽

Good Deal ◽

Granular Structure ◽

Oxidizing Agent ◽

Fixation Technique ◽

Large Clusters

Potassium permanganate has been successfully employed to study membranous structures such as endoplasmic reticulum, Golgi, plastids, plasma membrane and myelin sheath. Since KMnO4 is a strong oxidizing agent, deposition of manganese or its oxides account for some of the observed contrast in the lipoprotein membranes, but a good deal of it is due to the removal of background proteins either by dehydration agents or by volatalization under the electron beam. Tissues fixed with KMnO4 exhibit somewhat granular structure because of the deposition of large clusters of stain molecules. The gross arrangement of membranes can also be modified. Since the aim of a good fixation technique is to preserve satisfactorily the cell as a whole and not the best preservation of only a small part of it, a combination of a mixture of glutaraldehyde and acrolein to obtain general preservation and KMnO4 to enhance contrast was employed to fix plant embryos, green algae and fungi.

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Copper (I) Catalysed Conjugate Addition of Grignard Reagents to Enones

ChemSpider Synthetic Pages ◽

10.1039/sp35 ◽

2001 ◽

Author(s):

Kevin Booker-Milburn

Keyword(s):

Conjugate Addition ◽

Grignard Reagents

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Oxadiazinones as chiral auxiliaries: Asymmetric conjugate addition reactions with Ephedra based oxadiazinones

10.1021/scimeetings.0c01411 ◽

2020 ◽

Author(s):

Fatima Olayemi Obe ◽

Shawn Hitchcock

Keyword(s):

Conjugate Addition ◽

Addition Reactions ◽

Chiral Auxiliaries

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Conjugate addition of allylic lithium organocuprates and allylic organocopper(i) compounds to α-acetylenic esters

Tetrahedron Letters ◽

10.1016/s0040-4039(01)94668-4 ◽

1979 ◽

Vol 19 (20) ◽

pp. 1811-1814

Author(s):

P Miginiac

Keyword(s):

Conjugate Addition ◽

Acetylenic Esters

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Radiolabeling of Fibrinogen Using the Iodogen Technique

Thrombosis and Haemostasis ◽

10.1055/s-0038-1653425 ◽

1981 ◽

Vol 46 (03) ◽

pp. 593-596 ◽

Cited By ~ 52

Author(s):

Linda C Knight ◽

Andrei Z Budzynski ◽

Stephanie A Olexa

Keyword(s):

Specific Radioactivity ◽

Oxidizing Agent ◽

Iodine Monochloride ◽

Human Fibrinogen

SummaryThe properties of human fibrinogen labeled with 125-Iodine using Iodogen (1, 3, 4, 6-tetrachloro-3α, 6α-diphenylglycoluril) as an oxidizing agent were compared with those of an iodine monochloride labeled counterpart. It was found that thrombin clottability, binding to staphylococci, the relative specific radioactivity of the Aα, Bβ, and γ chains and in vivo clearance from plasma in rabbits were the same in these two labeled fibrinogen preparations. Labeling efficiency was higher when iodogen was used. It is concluded that human fibrinogen labeled with radioiodine using the Iodogen technique is suitable for studies in vitro and in vivo.

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Spectrophotometeric Determination of Trifluoperazine HCL in Pure Forms and Pharmaceutical Preperations

International Journal of Pharmaceutical and Clinical Research ◽

10.25258/ijpcr.v9i5.8593 ◽

2017 ◽

Vol 9 (5) ◽

Author(s):

Mohammad Hamzah Hamzah ◽

Rawa M M Taqi ◽

Muna M. Hasan ◽

Raid J. M. Al-Timimi

Keyword(s):

Standard Method ◽

Limit Of Detection ◽

Molar Absorptivity ◽

Dosage Forms ◽

Oxidizing Agent ◽

Optimum Conditions ◽

Limit Of Quantification ◽

Cerium Ion ◽

Blank Solution

A simple and accurate spectrophotometric method for the determination of Trifluoperazine HCl in pure and dosage forms was developed. The method is based on the reaction between Trifluoperazine HCl and p-chloroaniline in the presence of cerium ion as oxidizing agent which lead to the formation of violate color product that absorbed at a maximum wavelength 570nm while the blank solution was pink. Under the optimum conditions a linear relationship between the intensity and concentration of TRF in the range 4-50μg/ml was obtained . The molar absorptivity 3.74×103 L.mol-1.cm-1 , Limit of detection (2.21μg/ml), while limit of quantification was 7.39μg/ml. The proposed analytical method was compared with standard method using t-test and F-test , the obtained results shows there is no significant differences between proposed method and standard method. Based on that the proposed method can be used as an alternative method for the determination of TRF in pure and dosage forms.

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Photo-degradation of monoazo dye blue 13 using advanced oxidation process

10.31221/osf.io/dq46r ◽

2019 ◽

Author(s):

Chem Int

Keyword(s):

Aqueous Solution ◽

Advanced Oxidation Process ◽

Oxidation Process ◽

High Energy ◽

Uv Exposure ◽

H2o2 Concentration ◽

Oxidizing Agent ◽

Photo Degradation ◽

High Energy Radiation ◽

Uv Lamp

The high energy radiation overcome the bonding of solute in a solution and H2O2 acts as an oxidizing agent and generates a free radical in the solution which results in photo-degradation by converting the solute in to simple form and resultantly, colored substance under the effect of photo-degradation becomes colorless. The photo-degradation of monoazo dye Blue 13 in an aqueous solution was investigated using a laboratory scale UV lamp in the presence of H2O2 and for maximum degradation of dye, the independent parameter UV power, UV exposure time, pH and H2O2 concentration were optimized. It was found that neither UV in the presence of H2O2 is able to degrade Blue 13 under optimum condition. The results revealed that the use of both UV and H2O2 have pronounced effect on the discoloration of dyes which could be used for management of textile effluents contain waste dyes.

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