Vh. Rawal et al., PHOTOCYCLIZATION-FRAGMENTATION ROUTE TO LINEAR TRIQUINANES - STEREOCONTROLLED SYNTHESIS OF (+ -)-ENDO-HIRSUTENE/, Tetrahedron letters, 36(38), 1995, pp. 6851-6854
An efficient, stereocontrolled synthesis of (+/-)-endo-hirsutene was a
ccomplished, wherein the key steps include intramolecular Diels-Alder
and Paterno-Buchi reactions to build complexity, and a reductive fragm
entation to unravel the hidden linear triquinane skeleton.