Search for Highly Efficient, Stereoselective, and Practical Synthesis of Complex Organic Compounds of Medicinal Importance as Exemplified by the Synthesis of the C21C37 Fragment of Amphotericin B
Highly stereoselective: A highly efficient, stereoselective and practicalsynthesis of the C21C37 fragment of amphotericin B was realized in 25 % overall yield in eight longest linear steps from commercially available ethyl (S)‐3‐hydroxybutyrate by using Fráter–Seebach alkylation, Brown crotylboration, Negishi coupling, Heck reaction, and Horner–Wadsworth–Emmons (HWE) olefination as key steps (see