David M. Mayes - Overland Park KS Vijay C. Desai - Shawnee KS Eric Rivadeneira - Overland Park KS
Assignee:
Bayer Cropscience LP - Pittsburgh PA
International Classification:
C07C27708
US Classification:
564231, 564237, 564230
Abstract:
Processes for preparing -substituted benzylnitroguanidines include the steps of providing a reaction mixture comprising water, alcohol, an S-alkyl nitroisothiourea, and an -substituted benzylamine; heating the reaction mixture; steam distilling the alcohol from the reaction mixture; and isolating an -substituted benzylnitroguanidine from the remaining water layer.
Joe J. Hanson - Holt MO, US David M. Mayes - Overland Park KS, US Klaus Stroech - Solingen, DE Shekhar V. Kulkarni - Overland Park KS, US
Assignee:
Bayer CropScience LP - Research Triangle Park NC Bayer CropScience Aktiengesellschaft - Monheim
International Classification:
C07C 49/00 C07C 45/00
US Classification:
568316, 568303
Abstract:
The present invention provides a method of preparing 1-acetyl-1-chlorocyclopropane from 1,3 dichloro-2-pentanone by reaction with base in the presence of a phase transfer catalyst. The reaction may be run in the presence or absence of an organic solvent and in a continuous or batch process.
Process For Preparing O-Alkyl, O-Alkylphosphorochloridothioates
David M. Mayes - Overland Park KS Daniel M. Wasleski - Raytown MO Gerd Grah - Haan, DE Hermann Seifert - Bergisch Gladbach, DE
Assignee:
Bayer Corporation - Pittsburgh PA Bayer Aktiengesellschaft - Leverkusen
International Classification:
C07F 916
US Classification:
558 90
Abstract:
The invention relates to process for the preparation of an O-alkyl, O-alkyl phosphorochloridothioate by 1) reacting A) a thiophosphoryl halide with B) an alcohol, in the presence of C) a tertiary amine acid acceptor and D) a solvent, and 2) reacting the resultant product with a second alcohol, different from the alcohol used in step 1). In the preferred embodiment, the intermediate product is not isolated before reaction with the second alcohol.
Process For The Purification Of Substituted 4-Amino-1,2,4-Triazine-5-Ones
Vidyanatha A. Prasad - LeaWood KS David M. Mayes - Overland Park KS Peter E. Newallis - Leawood KS Karl G. Steinbeck - Leverkusen Monheim, DE
Assignee:
Miles Inc. - Pittsburgh PA
International Classification:
C07D253075
US Classification:
544182
Abstract:
Substituted 4-amino-1,2,4-triazine-5-ones are purified to remove unwanted N-isomers by maintaining the crude product at a temperature of from about 55. degree. C. to about 70. degree. C. in the presence of a hydroxide, preferably an alkali metal hydroxide for at least 0. 5 hour.
Process For Reducing Dithiocarbazinate Buildup In The Preparation Of Methyl Dithiocarbazinate
Disclosed herein is an improved process for preparing methyl dithiocarbazinate by reacting carbon disulfide and hydrazine in an effective ratio to form hydrazinium dithiocarbazinate, followed by methylating the hydrazinium dithiocarbazinate with methyl bromide. The improvement resides in conducting the reaction of the carbon disulfide and hydrazine in the presence of a specified amount of a non-alcoholic solvent to reduce dithiocarbazinate buildup.
Okanagan Centre, B.C., CANADADavid Mayes is the owner and President of Complete Home Energy Ltd. an Okanagan based firm providing energy efficiency home improvements. Before acquiring... David Mayes is the owner and President of Complete Home Energy Ltd. an Okanagan based firm providing energy efficiency home improvements. Before acquiring Complete Home Energy, Ltd., Mr. Mayes was engaged by New Zealand Trade & Enterprise, a government agency. In numerous visits to New Zealand, Mr...