Abstract
The first synthesis of α-amino phosphonates comprising porphyrin core was accomplished. Three methods of obtaining α-amino phosphonates 5-8 were compared. Conventional heating of formylporphyrins 1-4 with t-BuNH2 and (EtO)2P(O)H in various solvents was ultimately unsuccessful for preparing 5-8 whereas the use of microwave irradiation made it possible to obtain 5-8 in good yields. Regioselective preparation of 5-8 in excellent yields was achieved by combining microwave-assisting conditions and catalysis with CdI2. Efficient synthetic procedures of obtaining formylporphyrins 3,4 in large scale were also proposed.
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