6048. 3′-Methyl-1,2-cyclopentenophenanthrene

Nomenclature

CAS number: 549-38-2
16,17-Dihydro-17-methyl-15H-cyclopenta[a]phenanthrene; Diels' hydrocarbon.
C18H16; mol wt 232.32.
C 93.06%, H 6.94%.

Description and references

Prepd from cholesterol, cholic acid, or suitable sapogenins: Diels, Rickert, Ber. 68, 267 (1935); starting with 2-acetylphenanthrene: Gamble et al., J. Chem. Soc. 1935, 443, 644.

Chemical structure

Properties

Crystals from acetic acid, mp 126-127°. Absorption spectrum: Hillemann, Ber. 69, 2610 (1936).