From the results obtained in the hydrolysis reaction of the carbamate group of some thioderivatives compounds whose common structure is (2→ tOOCNH-C6H4)-CHOH-CH2Y a mechanism is suggested to explain the products, as well as the relationship between the relative configuration of diastereoisomeric sulfoxides (Y= SOMe) with the reaction rate and with the stereochemical outcome. Other interesting and unexpected products are yielded ...