Fjc. Martins et al., SYNTHESIS OF NOVEL TETRACYCLO[6.3.0.0(2,6).0(3,10)]UNDECANE AND TETRACYCLO[6.4.0.0(2,6).0(3,10)]DODECANE DERIVATIVES, Tetrahedron, 53(44), 1997, pp. 14991-14996
tetracyclo[6.3.0.0(2,6).0(3,10)]undecane-5,9-dione has been synthesise
d from entacyclo[6.3.0.0(2,6).0(3,10).0(5,9)]undecan-1-ol by chromium
trioxide oxidation. In the same fashion tetracyclo[6.4.0.0(2,6).0(3,10
)]dodecane-5,9-dione was obtained from pentacyclo[6.4.0.0.(2,6).0(5,9)
.0(4,12)] dodecan-2-ol. The synthesis of a 4,6-cyclised homologue is a
lso discussed. (C) 1997 Elsevier Science Ltd.