The Dow Chemical Company

Dow Agrosciences LLC

Eric W Otterbacher

Abel Mendoza

Ronald B Leng

Herbert Nathan Praay

R Garth Pews

Brian W Walther

Cynthia L Rand

Grace Y Lo

James A Gall

Massimo D Bezoari

Michael Allen Gonzalez

Robert B Baker, Jr

Cyhalofop is prepared by coupling 2-(4-hydroxyphenoxy)propionic acid and 3,4-difluorobenzonitrile with base in a polar aprotic solvent in the presence of a phase-transfer catalyst.

Process for the manufacture of R-(+)-2-(4-(4-cyano-2-fluorophenoxy)phenoxy)propionic acid esters

Cyhalofop esters are prepared by coupling 2-(4-hydroxyphenoxy)-propionic acid with 3,4-difluorobenzonitrile with base in a polar aprotic solvent (optionally including a phase-transfer catalyst), alkylating with alkyl halide, removing the polar aprotic solvent (optionally using cyhalofop ester as a flux), removing salt by aqueous extraction of molten cyhalofop ester without a solvent, and removing residual water by heating under reduced pressure.

2-Alkoxy-6-trifluoromethyl-N-(&lsqb;1,2,4&rsqb;triazolo&lsqb;1,5-c&rsqb;pyrimidin-2-yl)benzenesulfonamides are prepared by introducing the 2-alkoxy substituent of the benzenesulfonamide ring in the last step by contacting the corresponding 2-fluoro substituted material with the appropriate alkoxide.

Process for the preparation of 2-alkoxy-6-trifluoromethyl-N-(&lsqb;1,2,4&rsqb;triazolo&lsqb;1,5-c&rsqb;pyrimidin-2-yl) benzenesulfonamides

Narrow molecular weight telechelic and/or block copolymers are prepared by anionic polymerization using an initiator composition comprising a multifunctional lithium initiator in combination with an organic diamine or triamine and optionally a metal alkoxide.

Amine containing initiator system for anionic polymerization

Aromatic diketones are prepared by a process comprising contacting at least one acylatable aromatic compound and at least one aromatic diacyl halide in the presence of catalytic amounts of ferric chloride or ferric oxide at an elevated temperature and at superatmospheric conditions.

Acylation process to form diketones

Prepare novel .alpha.-aminoalkylphenols by contacting an .alpha.-alkenylphenol and an amine under reaction conditions.

Preparation of alpha-aminoalkylphenols

A class of novel tertiary alkyl isocyanates. Of these, novel carbonate diisocyanates can be prepared by contacting a carbonyl dihalide and an aminotertiaryalkylhydroxyaromatic compound in the presence of a base and a reaction medium under reaction conditions.

Preparation of carbonate diisocyanates and related compounds

Preparation of monoethers of dihydroxybenzenes from an alkenylphenol and an alkylating agent and thereafter oxidizing in the presence of an acid catalyst.

Preparation of monaoalkylated dihydroxybenzenes and novel compounds

Preparation of monoalkylated dihydroxybenzenes

Prepare hydroxyaromatic ethers by contacting an oxidizing agent with an acylaromatic ether in the presence of an acid catalyst.

Preparation of hydroxyaromatic ethers

Preparation of monoethers of dihydroxybenzenes from an isopropenylphenol and an alkylating agent and thereafter oxidizing in the presence of an acid catalyst.

Growing community of inventors

Midland, MI, United States of America

Eric W Otterbacher