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Betaenone

Before the biosynthetic studies, total synthesis of betaenone C (50) was completed through a biomimetic route as shown in Fig. 12 [40]. The synthetic strategy involving the intramolecular Diels-Alder reac-... [Pg.140]

C, 02]acetate exhibited that " 0-isotope-induced shifts were observed at C-16 and C-18 but not at C-1, C-2 and C-8 [43]. When P. betae was treated with cytochrome P450 inhibitor, ancymidol (1 mM), a less oxidized precursor named probetaenone I (57) was obtained [43]. Tbe structure and stereochemistry were confirmed by extensive NMR analysis and chiral synthesis via the similar route to that of betaenone C (50) [44]. Feeding experiments of C-labeled probetaenone I (57) demonstrated that the intermediate (57) was converted to betaenone B (49) [45]. Isolation of probetaenone I (57)... [Pg.141]

Fig. 12. Total synthesis of betaenone C (50) according to plausible biosynthetic route... Fig. 12. Total synthesis of betaenone C (50) according to plausible biosynthetic route...
Samarium(II) iodide promotes the reductive cleavage of a-alkoxy ketones. Pratt and Hopkins have utilized this protocol in synthetic studies en route to betaenone B (eq 6). ... [Pg.378]

Allopertusaric acid, in M-10093 Betaenone C, in B-10017 Dehydroconstipatic acid, in 1-10037 2,3-Dihydro-3,9-dihydroxy-9-deoxo-5-deoxy-5-oxoprotomycinolide IV, in D-20187 Isomuronic acid, 1-10037 Muronic acid, in M-10093 3,11,17,21 -Tetrahydroxypregnan-20-one, T-20083... [Pg.567]


See other pages where Betaenone is mentioned: [Pg.534]    [Pg.475]    [Pg.130]    [Pg.139]    [Pg.140]    [Pg.141]    [Pg.142]    [Pg.130]    [Pg.139]    [Pg.140]    [Pg.141]    [Pg.142]    [Pg.424]    [Pg.424]    [Pg.562]    [Pg.567]    [Pg.574]   
See also in sourсe #XX -- [ Pg.475 ]

See also in sourсe #XX -- [ Pg.140 , Pg.142 ]

See also in sourсe #XX -- [ Pg.4 , Pg.17 , Pg.475 , Pg.601 , Pg.602 , Pg.621 ]

See also in sourсe #XX -- [ Pg.4 , Pg.17 , Pg.475 , Pg.601 , Pg.602 , Pg.620 , Pg.621 ]




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Betaenone synthesis

Diels-Alder reactions betaenone

Intramolecular Diels-Alder reaction betaenone

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