SEARCH Articles Figures Tables 5-Methoxycarbonyl-3- Activating group methoxycarbonyl Methoxycarbonyl as activating group Methoxycarbonylation Methoxycarbonylation group Methoxycarbonylation group Methoxycarbonylations Migration methoxycarbonyl groups Two-Step Racemization of the 1,2-Bis(methoxycarbonyl)ethyl Group