You should consult a book on peptide chemistry. That should give you a range of conditions that you may find compatible. It would seem that you can hypothetically run your reaction is water. An amine is more nucleophilic than water, but this is going to be a rate effect. If the amine if much faster, okay, but if it is slow, then more hydrolysis. A Schotten-Baumann reaction is typically run in water to form amides.