Richard Garth Pews

43799302, Apr 12, 1983

Sep 14, 1981

6/301686

Richard G. Pews - Midland MI

The Dow Chemical Company - Midland MI

C07D23936

544298

The hydrolysis of 2-t-butyl-5-halopyrimidines is carried out in the presence of an alkali metal methoxide and a catalytic amount of an N-oxide, a disulfide or elemental sulfur to prepare 2-t-butyl-5-hydroxypyrimidine in good yields and purity.

44683545, Aug 28, 1984

Feb 15, 1983

6/466451

Zenon Lysenko - Midland MI
Richard G. Pews - Midland MI

The Dow Chemical Company - Midland MI

C07C12134
C07C12176

2604657

A continuous process for preparing 5-oxo-2,4-dichloro-4-alkyl or aryl pentanenitriles, e. g. , 5-oxo-2,4-dichloro-4-methylpentanenitrile-1 by reacting an. alpha. ,. alpha. -dichloroaldehyde with an acrylonitrile in a coil reactor.

44866089, Dec 4, 1984

Apr 22, 1983

6/487476

Zenon Lysenko - Midland MI
Richard G. Pews - Midland MI

The Dow Chemical Company - Midland MI

C07C 4563
C07C 4714

568466

A process for making mono- and dichlorinated or brominated aldehydes from aldehydes having at least 3 carbon atoms and hydrogens alpha to the carbonyl group or primary alcohols having at least 3 carbon atoms and hydrogens in the 2-position by direct bromination or chlorination by carrying out the bromination or chlorination in an inert organic solvent with bromine or chlorine and containing a catalyst complex of HX and an N,N-dialkyl or cycloalkylformamide where X is a counterion.

44865902, Dec 4, 1984

Aug 2, 1982

6/404268

Richard G. Pews - Midland MI

The Dow Chemical Company - Midland MI

C07D23930

544334

2-t-Butyl-5-chloropyrimidine is made by the direct chlorination of 2-t-butylpyrimidine with elemental chlorine in an acetic or propionic acid solution at temperatures of 40. degree. to 90. degree. C. in the presence of a buffer.

53997689, Mar 21, 1995

Dec 23, 1993

8/173452

Zenon Lysenko - Midland MI
Richard G. Pews - Midland MI

The Dow Chemical Company - Midland MI

C07C20918

564418

The present invention relates to a method of preparing 4,6-diaminoresorcinol from 1,2-dichloro-3,5-dinitrobenzene comprising the steps of: (a) contacting 1,2-dichloro-3,5-dinitrobenzene with a hydroperoxide in the presence of anhydrous base to form 2,3-dichloro-4,6-dinitrophenol; (b) contacting 2,3-dichloro-4,6-dinitrophenol with a hydroxy-containing compound to form 2-chloro-4,6-dinitroresorcinol; and (c) converting 2-chloro-4,6-dinitroresorcinol to 4,6-diaminoresorcinol, which is isolated as a salt or other stabilized form thereof,.

54141303, May 9, 1995

Dec 23, 1993

8/173547

Zenon Lysenko - Midland MI
Richard G. Pews - Midland MI
Paul Vosejpka - Midland MI

The Dow Chemical Company - Midland MI

C07C20936

564418

A method of producing 4,6-diaminoresorcinol comprising a) reducing a dinitroarylether of the formula: ##STR1## wherein R is hydrogen, C. sub. 1 -C. sub. 6 alkyl, cycloalkyl or CH. dbd. CH. sub. 2, R' is hydrogen or CH. sub. 2 --R, each A is independently Cl, Br, or I, and n is 0, 1 or 2; to form a diaminoarylether, and b) cleaving the ether group(s) from the diaminoarylether under conditions such that 4,6-diaminoresorcinol is formed as a salt or other stabilized form thereof.

44232225, Dec 27, 1983

May 21, 1982

6/380644

Mary L. Ash - Midland MI
Richard G. Pews - Midland MI

The Dow Chemical Company - Midland MI

C07D21361
C07D21340

546337

Suitably substituted 2-aminomethyl pyridines and suitably substituted 2-pyridinylcarbinols are reacted with 3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropane carboxoyl chloride in an inert solvent to form a group of biologically active organic compounds. These compounds are active as fungicides, herbicides, or both.

44355734, Mar 6, 1984

Oct 25, 1982

6/436231

Zenon Lysenko - Midland MI
Richard G. Pews - Midland MI

The Dow Chemical Company - Midland MI

C07D21309

546250

Substituted pyridines are prepared by the base and transition metal catalyzed ring closure of substituted 5-oxo-pentane-1-nitriles.