Highly stereoselective and efficient synthesis of the dopa analogue in pepticinnamin E via enantioselective hydrogenation of dehydroamino acids

An efficient and new method was developed to prepare the dopa analogue 11 in natural pepticinnamin via catalytic hydrogenation of dehydroamino acids (DDAA) with a good yield and ee. Product 11 is a key intermediate towards the total synthesis of pepticinnamin E and its analogues.