Investigations into a biomimetic approach toward CP-225,917 and CP-263,114.

A biosynthesis of the structurally complex nonadride CP-225,917 (1) is outlined. A key step in this proposal is the dimerization of a C(16) anhydride derived from the condensation of lauric acid and oxaloacetic acid. An important element of this step is a templating effect imposed by two thioester linkages, reminiscent of a polyketide or fatty acid synthase pathway. On the basis of this principle, the dimerization of two C(11) anhydrides, templated by a 1,n-diol tether, leading to the core structure of CP-225,917 and CP-263,114 was investigated.