(+)-Tubelactomicin A (1), an antitubercular lactone, has been synthesized from (S)-citronellol (2) and 2-deoxy-l-ribonolactone (18) through intramolecular Diels–Alder reaction, Suzuki–Miyaura coupling, and Shiina macrolactonization.
[reaction: see text]. We have completed the totalsynthesis of natural (+)-tubelactomicin A (1), a 16-membered macrolide antibiotic. This Letter presents a highly efficient synthesis of the upper-half segment (C14-C24) and the completion of the totalsynthesis featuring a high-yielding Stille coupling for the connection of the upper-half and lower-half segments and Mukaiyama macrolactonization for
A novel 16-membered lactone antibiotic named tubelactomicin A was isolated from the culture broth of Nocardia sp. MK703-102F1. The structure of tubelactomicin A was assigned by spectroscopic analysis and the absolute configuration was determined by X-ray crystallographic analysis.