Two simultaneous mechanisms are proposed in the last figure of your poster.
Concerning the first I would like to make two questions:
1. If you use O(18)-labeled water, where do you expect the O(18) atom to be
incorporated: in the hydroxyl or in the ester group?
2. Didn't you ever detect the 2-acetoxy-3-hydroxy product?
Best regards,
Jo=E3o Aires de Sousa.
Joao Aires de Sousa
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