Bicyclo[2.2.1]heptanes in organic synthesis. Total synthesis of the 16-membered ring macrolide tylonolide hemiacetal: synthesis and coupling of the C(3)-C(9) and C(11)-C(17) fragments
Bicyclo[2.2.1]heptanes in organic synthesis. Total synthesis of the 16-membered ring macrolide tylonolide hemiacetal: synthesis and coupling of the C(3)-C(9) and C(11)-C(17) fragments
The fragment C11-C17 of tylonolide 2 was straightforwardly and stereoselectively synthesized starting from monoacetate 5, which is a synthetic equivalent of “asymmetrized tris (hydroxymethyl)methane” 3.