Dennis E Jackman, 847350 Roe Cir, Prairie Village, KS 66208
Dennis Jackman Phones & Addresses
Prairie Village, KS
Winchester, CA
148 Church St, Barre, VT 05641
Kansas City, MO
Lawrence, KS
Shawnee Msn, KS
Mentions for Dennis E Jackman
Publications & IP owners
Us Patents
Methods Of Purifying 2-Methylthio-5-Trifluoromethyl-1,3,4-Thiadiazole
US Patent:
6469175, Oct 22, 2002
Filed:
Feb 20, 2001
Appl. No.:
09/789369
Inventors:
Dennis E. Jackman - Prairie Village KS
Joe J. Hanson - Holt MO
Joe J. Hanson - Holt MO
Assignee:
Bayer Corporation - Pittsburgh PA
International Classification:
C07D28512
US Classification:
548136
Abstract:
Methods of purifying 2-methylthio-5-trifluoromethyl-1,3,4-thiadiazole include the steps of providing a first 2-methylthio-5-trifluoromethyl-1,3,4-thiadiazole composition comprising 2-methylthio-5-trifluoromethyl-1,3,4-thiadiazole and organic solvent; performing a first extraction of the 2-methylthio-5-trifluoromethyl-1,3,4-thiadiazole composition with a first inorganic acid solution; and performing a second extraction of the 2-methylthio-5-trifluoromethyl-1,3,4-thiadiazole composition with a second inorganic acid solution.
Processes For The Production Of Methyl Dithiocarbazinate
US Patent:
6545172, Apr 8, 2003
Filed:
Apr 18, 2002
Appl. No.:
10/124850
Inventors:
Vidyanatha A. Prasad - Leawood KS
Klaus Jelich - Wuppertal, DE
Dennis E. Jackman - Prairie Village KS
Klaus Jelich - Wuppertal, DE
Dennis E. Jackman - Prairie Village KS
Assignee:
Bayer Corporation - Pittsburgh PA
International Classification:
C07C33300
US Classification:
558233
Abstract:
A process for the production of methyl dithiocarbazinate includes the steps of providing a mixture comprising hydrazine, solvent, carbon disulfide and base; adding methyl bromide to the mixture; cooling the reaction mixture; and recovering methyl dithiocarbazinate. The methyl dithiocarbazinate may be recovered by filtering the reaction mixture to yield a solid methyl dithiocarbazinate retentate and a liquid filtrate; acidifying the filterate with a mineral acid; and adding methyl isobutylketone to the acidified filterate.
Processes For Preparing 3.3-Dimethylbutyric Acid
US Patent:
6686501, Feb 3, 2004
Filed:
Feb 5, 2002
Appl. No.:
10/068631
Inventors:
Dennis E. Jackman - Prairie Village KS
Assignee:
Bayer Corporation - Pittsburgh PA
International Classification:
C07C 5300
US Classification:
562606, 562512
Abstract:
A process for preparing 3,3-dimethylbutyric acid includes the steps of reacting trimethylpyruvic acid with a first portion of hydrazine to obtain a ketazine, and treating the ketazine with base and a second portion of hydrazine.
Method Of Preparing Substituted 4-Amino-3-Alkylthio-1,2,4-Triazine-5-Ones
US Patent:
6852857, Feb 8, 2005
Filed:
May 16, 2002
Appl. No.:
10/147386
Inventors:
Dennis E. Jackman - Prairie Village KS, US
Assignee:
Bayer MaterialScience LLC - Pittsburgh PA
International Classification:
C07D253/07
C07D253/075
C07D253/075
US Classification:
544182
Abstract:
The present invention provides a method of preparing 4-amino-3-alkylthio-1,2,4-triazine-5-ones of the formula (I): wherein R, R, Rand Rare as defined herein, the method comprising reacting in the presence of a base and under at least one condition selected from the presence of at least one inorganic compound selected from inorganic sulfites and inorganic bisulfites, an inert gas purge, and an alternating inert gas blanket and vacuum, a 4-amino-3-mercapto-1,2,4-triazin-5-one of the formula (II): wherein R, Rand Rare as defined herein, with an alkylating agent of the formula R—X, wherein Rand X are as defined herein and collecting the reaction product.
Selective Halogenation Of Ketones
US Patent:
2004002, Feb 5, 2004
Filed:
Jul 1, 2002
Appl. No.:
10/186535
Inventors:
Dennis Jackman - Prairie Village KS, US
International Classification:
C07C045/63
B01D003/34
B01D003/34
US Classification:
568/315000, 568/393000, 203/028000
Abstract:
The present invention provides a process and apparatus for selectively halogenating a ketone of the formula (I) wherein R represents unsubstituted or halogen-substituted C-C-alkyl, or aryloxy, R, Rand Rindependently represent hydrogen, halogen, C-C-alkyl or aryl, the process involving heating the ketone to reflux in a reaction vessel such that the ketone vapor contacts a condensor attached to the reaction vessel and condenses, reacting the condensed ketone with halogen gas, and collecting the selectively halogenated ketone in the reaction vessel.
Oxygen-Ruthenium Oxide Oxidation Of 2-Hydroxy-3,3-Dimethyl-Butanoic Acid
US Patent:
5091568, Feb 25, 1992
Filed:
May 23, 1986
Appl. No.:
6/867345
Inventors:
Dennis E. Jackman - Prairie Village KS
Assignee:
Mobay Corporation - Pittsburgh PA
International Classification:
C07C 51373
C07C 59185
C07C 59185
US Classification:
562577
Abstract:
In the oxidation of 2-hydroxy-3,3-dimethyl-butanoic acid in solution in the presence of a ruthenium oxide catalyst to produce 2-oxo-3,3-dimethyl-butanoic acid, the improvement wherein oxidation is effected with oxygen.
Process For Preparing Methyl Dithiocarbazinate By Reacting Methyl Bromide With The Reaction Product Of Carbon Disulfide, Hydrazine And An Adjunct Base
US Patent:
6025514, Feb 15, 2000
Filed:
Sep 21, 1998
Appl. No.:
9/157483
Inventors:
Dennis E. Jackman - Prairie Village KS
David T. Erdman - Kansas City MO
Peter E. Newallis - Leawood KS
Daniel M. Wasleski - Blue Springs MO
Vijay C. Desai - Shawnee KS
Jeffrey D. Macke - Kansas City MO
Vidyanatha A. Prasad - Leawood KS
David T. Erdman - Kansas City MO
Peter E. Newallis - Leawood KS
Daniel M. Wasleski - Blue Springs MO
Vijay C. Desai - Shawnee KS
Jeffrey D. Macke - Kansas City MO
Vidyanatha A. Prasad - Leawood KS
Assignee:
Bayer Corporation - Pittsburgh PA
International Classification:
C07C33328
US Classification:
558233
Abstract:
Disclosed herein is a process for preparing high yields of methyl dithiocarbazinate by reacting carbon disulfide, hydrazine and a base in an aqueous medium, in an effective ratio to form a dithiocarbazinate salt followed by methylating the dithiocarbazinate salt with methyl bromide.
Catalytic Oxidation Of 3,3-Dimethyl-2-Hydroxybutyric Acid To 2-Oxo Acid And Preparation Of 4-Amino-6-Tert.-Butyl-3-Thio-1,2,4-Triazine-5(4-H)-One
US Patent:
4614822, Sep 30, 1986
Filed:
Aug 26, 1980
Appl. No.:
6/181542
Inventors:
Dennis E. Jackman - Prairie Village KS
Assignee:
Mobay Chemical Corporation - Pittsburgh PA
International Classification:
C07C 51373
C07C 59185
C07D25306
C07C 59185
C07D25306
US Classification:
544182
Abstract:
Sodium 3,3-dimethyl-2-hydroxybutyrate and ruthenium dioxide hydrate are added to water, the pH rendered alkaline, and sodium hypochlorite is slowly added to produce sodium 3,3-dimethyl-2-oxobutyrate in high yield and purity. The solid catalyst is filtered off and may be re-used while the filtrate can be directly used in further synthesis.
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