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With the development of green chemistry as the purpose, the application of the economy easily obtained, odorless, stable a-carboxyl two ketene as an alternative to thiol reagents in organic synthesis is studied. Under mild conditions, the mercaptal / ketone reaction by taking a-carboxyl two ketene as odorless thiol reagents is successfully implemented. The experiment is carried out in acetyl chloride methanol system. First of all, the mercaptal / ketone reaction by substituting the reagents bydoi:10.3303/cet1759036 doaj:e31736411a5f46e9a261a984e8c9f056 fatcat:tyci2my2nnb3ffmbrgv724dahe