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Methyl angolensate

The configuration of the ether oxygen at C-1 in methyl angolensate (130) has been unambiguously shown to be a by a partial synthesis from 7-deacetyl-7-oxokhivorin via the deoxy-compound (131). The latter was converted by peracetic acid oxidation to the e-lactone (132) and this was opened by toluene-p-sulphonic acid in benzene to give the diene-lactone (133). Mild alkaline hydrolysis of the... [Pg.182]

Cleavage of ring B of intermediate compounds similar to khivorin (23) (Fig. 25.1) may give rise to compounds such as andirobin (22) and methyl angolensate (24) (a B,D-scco-limonoid) (Fig. 25.6). This cleavage also may be concealed... [Pg.475]

Pyrolysis prod, of methyl angolensate (see Angolensic acid, A-01717). Cryst. Mp 145-145.5+ [oc] +60 (CHCI3). [Pg.334]

Cedrelone (518) is the major tetranortriterpenoid from heartwood of Cedrela toona. Methyl angolensate (519), a component of several West African timbers (e.g., Khaya grandifoliola) is an example of a B-seco limonoid. In nimbin (520), which is present in almost all parts of the Indian tree Melia azedarachta, ring C is... [Pg.776]

The simplest example of this is methyl angolensate (38) which is one of the commonest limonoids. Cyclisation (Scheme 7) of the la,3a-diol related to andirobin gave the 3a-alcohol, which was oxidised to methyl angolensate... [Pg.19]

This alcohol can be obtained from methyl angolensate by borohydride reduction (75) or by rapid reduction with aluminium isopro-poxide. Prolonged reduction with isopropoxide leads to equilibration to the equatorial 3P-isomer (76). [Pg.20]

This is still a very small group. The original member, methyl ivorensate (57), is found in small amount in Khaya ivorensis 14) and was synthesised by oxidation of methyl angolensate with perbenzoic acid (75). It has... [Pg.29]

Mahoganin Swietenia mahogani Structure in error. Mixture of methyl angolensate and methyl-6-hydroxyangolensate 189)... [Pg.92]

Substance I Xylocarpus moluccensis Identified as methyl angolensate 200)... [Pg.92]

Purushothaman, K. K., and S. Chandrasekharan Occurrence of Methyl Angolensate and Deoxyandirobin in Soymida febrifuga. Indian J. Chem. 12, 207 (1974). Chemical Abstracts 81, 101847J (1974). [Pg.100]

Methyl acetolactate, A33 Methyl angolensate, T52 0-methylanhalonidine, K2 a-methylaspartic acid, A40... [Pg.165]

See other pages where Methyl angolensate is mentioned: [Pg.408]    [Pg.5]    [Pg.153]    [Pg.490]    [Pg.176]    [Pg.180]    [Pg.183]    [Pg.505]    [Pg.129]    [Pg.30]    [Pg.31]    [Pg.19]    [Pg.19]    [Pg.40]    [Pg.65]    [Pg.66]    [Pg.95]    [Pg.96]    [Pg.64]   
See also in sourсe #XX -- [ Pg.476 ]

See also in sourсe #XX -- [ Pg.52 ]

See also in sourсe #XX -- [ Pg.776 ]

See also in sourсe #XX -- [ Pg.19 , Pg.20 , Pg.29 , Pg.40 , Pg.65 ]



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