Process for preparation of thiols using a benzopinacol initiator

Details Process for preparation of thiols using a benzopinacol initiator Process for preparation of thiols using a benzopinacol initiator

1977-04-18

1978-09-26

Gotts, Lewis

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

20415922, 260609D, 260455R, 528376, 560 26, C07C14900

Patent

active

041170172

ABSTRACT:
This invention relates to a process for preparing thiols and polythiols by the addition of a thiolcarboxylic acid, e.g., thiolacetic acid, to ethylenically unsaturated compounds in the presence of an initiator comprising a pinacol of the general formula: ##STR1## wherein R.sub.1 and R.sub.3 are members independently selected from the group consisting of substituted and unsubstituted aromatic radicals, R.sub.2 and R.sub.4 are members independently selected from the group consisting of substituted and unsubstituted aliphatic and aromatic radicals and X and Y are members independently selected from the group consisting of hydroxyl, alkoxy and aryloxy to obtain a thiol ester which is thereafter hydrolyzed to yield the corresponding thiol.

REFERENCES:
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patent: 2551813 (1951-05-01), Pinkney
patent: 3050452 (1962-08-01), Louthan
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patent: 3522313 (1970-07-01), Reece et al.
patent: 3607945 (1971-09-01), Reece
patent: 3823191 (1974-07-01), Dighe
D. Braun et al., Chemical Abstracts, 71:3671w, (1969).

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