References of 1-Phenanthrenecarboxylicacid, 1,2,3,4,4a,9,10,10a-octahydro-6-hydroxy-1,4a-dimethyl-, (1S,4aS,10aR)-
Title: Podocarpic Acid
CAS Registry Number: 5947-49-9
CAS Name: [1
S-(1a,4aa,10ab)]-1,2,3,4,4a,9,10,10a-Octahydro-6-hydroxy-1,4a-dimethyl-1-phenanthrenecarboxylic acid
Synonyms: 12-hydroxypodocarpa-8,11,13-trien-16-oic acid
Molecular Formula: C17H22O3
Molecular Weight: 274.35
Percent Composition: C 74.42%, H 8.08%, O 17.50%
Literature References: Chief acidic constituent of the resin of the Javanese
Podocarpus cupressina (L'Hérit.) Pers.,
Coniferae, esp. in
var. imbricata. Also in New Zealand kahikatea resin (from
Podocarpus dacrydioides) and in rimu resin
(Dacrydium cupressinum). A related component, nimbiol,
q.v., occurs in the nim tree,
Azadirachta indica Juss. (
Melia azadirachta L.),
Meliaceae. Isoln from
Podocarpus cupressina: A. C. Oudemans,
Ber. 6, 1122 (1873); from
Dacrydium cupressinum: I. R. Sherwood, W. F. Short,
J. Chem. Soc. 1938, 1008. Structure: Campbell, Todd,
J. Am. Chem. Soc. 64, 928 (1942). Conversion to nimbiol as proof of structure: Bible,
Tetrahedron 11, 22 (1960). Synthesis from desoxypodocarpic acid: Wenkert, Jackson,
J. Am. Chem. Soc. 80, 217 (1958). Total synthesis of
dl-form: Meyer, Maheshwari,
Tetrahedron Lett. 1964, 2175; P. R. Kanjilal
et al., Synth. Commun. 11, 795 (1981). Synthesis: Pelletier
et al., Tetrahedron Lett. 1971, 4179.
Properties: Platelets from dil alcohol, mp 193.5°. [a]20546 +165° (c = 4 in abs ethanol). Sol in methanol, ethanol, ether, acetic acid. Practically insol in water, chloroform, benzene, carbon disulfide.
Melting point: mp 193.5°
Optical Rotation: [a]20546 +165° (c = 4 in abs ethanol)
Derivative Type: Methyl ester
Molecular Formula: C18H24O3
Molecular Weight: 288.38
Percent Composition: C 74.97%, H 8.39%, O 16.64%
Properties: Crystals from alcohol, mp 208°.
Melting point: mp 208°