Abstract An asymmetric aldol reaction using Oppolzer's sultam has provided a practical and efficient synthetic route (15 steps, overall yield ca. 24%) to 12 compounds of the Antimycin A family and deisovalerylblastmycin, which were obtained in pure form on a 60–300 mg scale. In the syntheses, the nine-membered dilactone ring was constructed successfully by lactonization of a 2-pyridinethiol ester bearing a TIPS group on the 8-OH by using the ( ...
![N-[(3S,4R,7R,8R,9S)-4,9-Dimethyl-2,6-dioxo-7-butyl-8-hydroxy-1,5-dioxonane-3-yl]-3-(formylamino)-2-hydroxybenzamide Structure](https://image.chemsrc.com/caspic/047/60504-95-2.png)
