Alliedsignal Inc.

David Ryckman

Mingbao Zhang

Eric MacMillan

William J Boyle, Jr

Heng Eric Su

Zhenrong Qian

Guohua Chen

Indira Reddy

A method for the preparation of aromatic hydroxythiols including oxidizing an aromatic aminothiol to form an aminodisulfide compound; forming a bis-diazonium salt of the aminodisulfide compound; and reacting the bis-diazonium salt with water to form an aromatic hydroxyldisulfide compound, which is then reduced to the hydroxythiol. New bis-diazonium aromatic disulfide compounds are also disclosed.

Aromatic hydroxythiol synthesis using diazonium salts

A method of preparing an ester of a carboxylic acid functionalized with a moiety selected from the group consisting of halides, sulfonates, ethers, hydroxyl, amines, and aldehydes, said method comprising: (a) providing either a carboxylic acid having a vinyl group or an ester thereof; (b) functionalizing the vinyl carbon closest to the carboxyl group with said moiety, wherein said functionalizing comprises cleaving said vinyl group.

Synthesis of functionalized esters

A method for the preparation of hydroxythiol compounds by reacting a hydroxyl-protected halide compound having the structure:

Hydroxythiol grignard reaction synthesis

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Seattle, WA, United States of America

David Ryckman