Construction of the taxane skeleton via the stereoselective conjugate addition of cyanide and the intramolecular B-alkyl Suzuki–Miyaura coupling reaction
Construction of the taxaneskeleton via the stereoselective conjugate addition of cyanide and the intramolecular B-alkyl Suzuki–Miyaura coupling reaction is described. A conjugate addition of cyanide to enone 17 proceeded diastereoselectively to provide the desired 18 incorporating the correct C3 stereogenic center in the taxol C-ring. The intramolecular B-alkyl Suzuki–Miyaura coupling reaction of 22, which