(R)-a-Biphenylsulfonylamino 2-methylpropyl phosphonates attain nM potency against several MMPs and are the most effective inhibitors based on phosphonate as zinc binding group. Since their preparation by direct N-acylation of expensive, enantiopure, a-aminophosphonic acids proceeds in low yields, we devised and evaluated a stereoselective and straightforward method of synthesis that avoids the unfavourable step of N-acylation. The key intermediate (R)-4-bromophenylsulfonylamino 2-methylpropyl phosphonate 9 was obtained by highly stereoselective addition of dibenzylphosphite to the enantiopure (S)-N-isobutylidene-pbromobenzenesulfinamide 3, followed by oxidation with m-CPBA. Suzuki coupling of 9 with the desired arylboronic acids, gave the expected biphenylsulfonylamino derivatives in satisfactory yields. Liberation of the phosphonic group by hydrogenolysis led to the desired (R)-a-biphenylsulfonylamino 2-methylpropyl phosphonates 14a–i. Screening of the new compounds on MMP-1, -2, -3, -7, -8, -9, -13 and -14 showed IC50 in the range of nM in most cases.

alpha-Biphenylsulfonylamino 2-methylpropyl phosphonates: Enantioselective synthesis and selective inhibition of MMPs

NUTI, ELISA;ROSSELLO, ARMANDO;
2007

Abstract

(R)-a-Biphenylsulfonylamino 2-methylpropyl phosphonates attain nM potency against several MMPs and are the most effective inhibitors based on phosphonate as zinc binding group. Since their preparation by direct N-acylation of expensive, enantiopure, a-aminophosphonic acids proceeds in low yields, we devised and evaluated a stereoselective and straightforward method of synthesis that avoids the unfavourable step of N-acylation. The key intermediate (R)-4-bromophenylsulfonylamino 2-methylpropyl phosphonate 9 was obtained by highly stereoselective addition of dibenzylphosphite to the enantiopure (S)-N-isobutylidene-pbromobenzenesulfinamide 3, followed by oxidation with m-CPBA. Suzuki coupling of 9 with the desired arylboronic acids, gave the expected biphenylsulfonylamino derivatives in satisfactory yields. Liberation of the phosphonic group by hydrogenolysis led to the desired (R)-a-biphenylsulfonylamino 2-methylpropyl phosphonates 14a–i. Screening of the new compounds on MMP-1, -2, -3, -7, -8, -9, -13 and -14 showed IC50 in the range of nM in most cases.
Biasone, A; Tortorella, P; Campestre, C; Agamennone, M; Preziuso, S; Chiappini, M; Nuti, Elisa; Carelli, P; Rossello, Armando; Mazza, F; Gallina, C.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/194535
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