Results 161 to 170 of about 1,739 (207)

Chemistry of the podocarpaceae

Journal of Organometallic Chemistry, 1986
Abstract A pentacarbonylcarbene chromium complex of the diterpenoid methyl O-methylpodocarpate has been prepared and its reactions with some alkynes have been studied with the aim fo synthesising ring-C aromatic steroids. The use of diphenylacetylene resulted in cyclisation to give steroidal derivatives in moderate yield.
Richard C. Cambie, Peter S. Rutledge, Moana Tercel, Paul D. Woodgate   +3 more
openaire   +1 more source

First extra‐Patagonian record of Podocarpaceae fossil wood in the Upper Cenozoic (Ituzaingó Formation) of Argentina [PDF]

New Zealand Journal of Botany, 2015
The main objective of the present paper is to describe a new genus and species of Podocarpaceae fossil wood from the Upper Cenozoic Ituzaingó Formation, Paraná Basin, Argentina, based on a detailed description of the secondary xylem.
M Jimena Franco
exaly   +2 more sources

Podocarpaceae woods (Coniferales) from middle Jurassic La Matilde formation, Santa Cruz province, Argentina [PDF]

Review of Palaeobotany and Palynology, 2007
The anatomy of Podocarpaceae petrified woods (Coniferales) from La Matilde Formation (Middle Jurassic), that crop out in the Gran Bajo de San Julián area, of Santa Cruz province, Argentina are studied.
Silvia Gnaedinger
exaly   +2 more sources

Chemistry of the podocarpaceae—VIII

Tetrahedron, 1963
Abstract Macrophyllic acid from the heartwood of Podocarpus macrophyllus has been shown to be the bisditerpenoid dicarboxylic acid (I, R  H) related to podototarin, and its di-O-methyl dimethyl ester synthesized from 16-hydroxytotarol. Podototarin (IV, R  CH3) has been prepared by a one-step enzymatic coupling of (+)-totarol and the coupling ...
S.M. Bocks, R.C. Cambie, T. Takahashi
openaire   +1 more source

Chemistry of the podocarpaceae—XVI

Tetrahedron, 1968
Abstract Treatment of 6α-bromo-7-oxototaryl acetate (II, R = OAc) with NaHCo 3 /DMSO gives 6α-bromo-7-oxototarol (II, R = OH, 5%), Δ 5 -dehydro-7-oxototaryl acetate (III, R = OAc, 45%), Δ 5 - dehydro-7-oxototarol (III, R = OH, 15%), and by fission of the dA/B ring junction, 7-oxo-5,10-secototara- 5,8,10(20),11,13-penataen-13-ol (IV, R = H, 5%).
R.C. Cambie, R.T. Gallagher
openaire   +1 more source

Chemistry of the podocarpaceae—III

Tetrahedron, 1959
Abstract A new lignan for which the name seco-isolariciresinol is proposed, has been isolated from the heartwood of Podocarpus spicatus. The structure has been shown to be 2:3-bis(4′-hydroxy-3′- methoxybenzyl)-butan-1:4-diol (II, R = H), and confirmed by an absolute synthesis from (−)-matairesinol (I, R = H).
L.H. Briggs, R.C. Cambie, J.L. Hoare
openaire   +1 more source

Chemistry of the podocarpaceae—VII

Tetrahedron, 1963
Abstract Totarol (I,R  CH3), 16-hydroxytotarol (I,R  CH2OH) 16-oxototarol (I,R  CH:O), sugiol, podocarpic acid, and two unidentified compounds have been isolated from the heartwood of Podocarpus hallii. The structure (II, R  H) of podototarin, found in P. totara but not in P.
R.C. Cambie, W.R.J. Simpson, L.D. Colebrook   +2 more
openaire   +1 more source

Chemistry of the podocarpaceae—XIV

Tetrahedron, 1967
Abstract The per-acid oxidation of some phenols and their methyl ethers in the podocarpa-8,11,13-triene series has given both p -benzoquinones and 4-hydroxycyclohexa-2,5-dienones. When reaction mixtures were heterogenous, oxidation also occurred at a Me group remote from the phenolic ring.
G.F. Burkinshaw, B.R. Davis
openaire   +1 more source

Chemistry of the podocarpaceae—VI

Tetrahedron, 1962
Abstract Totarol (I, R = H), 16-hydroxytotarol (I, R = OH), sugiol (II), podocarpic acid (III, R = H), methyl podocarpate (III, R = CH 3 ), pododacric acid, β-sitosterol, and two unidentified compounds, the major one of which has been named podototarin, have been isolated from the heart-wood of Podocarpus totara .
R.C. Cambie, L.N. Mander
openaire   +1 more source

Chemistry of the podocarpaceae—IV

Tetrahedron, 1959
Abstract The extractives of the heartwood of Podocarpus dacrydioides A. Rich. contain the known diterpenoid constituents, podocarpic acid (I, R = H), methyl podocarpate (I, R = CH3), ferruginol (II), Δ9-dehydro-ferruginol (III), sugiol (9-ketoferruginol, IV), xanthoperol (V) (in trace amount) and a new resin acid, C20H28O5, for which the name ...
L.H. Briggs, R.C. Cambie, R.N. Seelye, A.D. Warth   +3 more
openaire   +1 more source