Total synthesis of an antitubercular lactone antibiotic, (+)-tubelactomicin A

(+)-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.