Onion essential oil chemistry. Cis-and trans-2-mercapto-3,4-dimethyl 2,3-Dihydrothiophene (cas 1120-59-8) from pyrolysis of bis(1-propenyl) disulfide☆
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Add time:09/29/2019 Source:sciencedirect.com
Heating the onion oil component bis(1-propenyl) disulfide gives cis/-and trans-2-mercapto-3,4-dimethyl-2,3-Dihydrothiophene (cas 1120-59-8) which can lose H2S upon further heating giving 3,4-dimethylthiophene. A dithio-Claisen rearrangement is proposed for the key step.
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