19 – Free-Radical-5-Exo-Trig Cyclization of Chiral 3-Silylhepta-1,6-dienes. A Concise Approach to the A-B-C Ring Core of Hexacyclinic Acid

James, P.; Felpin, F.-X.; Landais, Y.; Schenk, K.
J. Org. Chem. 2005, 70, 7985-7995