Total synthesis and enzyme-substrate interaction of D -, DL -, and L -phosphinotricine, ‘bialaphos’(SF-1293) and its cyclic analogues

DL-Phosphonotricine (3) and its cyclic analogue (4) have been synthesized using the four-component isocyanide condensation of Ugi and Ugi-analogous three-component condensation, respectively. High selectivity of the enzyme-substrate interaction was established with the enzymes α-chymotrypsin, phosphodiesterase I, and alkaline mesintericopeptidase, as well as by separation of the racemic mixture to optical antipodes by the α-chymotripsin. The tripeptide ‘bialaphos’(11) and its D-antipode (11a) have been synthesized by the method of activated esters, and the cyclic analogue (15) by the DCC method. It was found that the phospholane L-(5) and the tripeptide (18) exhibit anti-tumour activity.