L. Minuti et al., HIGH-PRESSURE DIELS-ALDER REACTIONS OF 2-VINYL-3,4-DIHYDRONAPHTHALENE- SYNTHESIS OF CYCLOPENTA[C]PHENANTHRENONES AND INDENO[C]PHENANTHRENONES, Tetrahedron, 51(32), 1995, pp. 8953-8958
A new shorter synthesis of 2-vinyl-3,4-dihydro-naphthalene has been de
scribed. The Diels-Alder reactions of this diene with 4-acetoxy-2-cycl
openten-1-one, 3-bromoindan-1-one and inden-1-one under high pressure
conditions are reported. A two step synthesis of cyclopenta[c]-and ind
eno[c]phenanthrenones is discussed. Structure analysis by H-1 and C-13
NMR spectroscopy is presented.