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- W1176484772 abstract "The triterpene precursor, 12-methoxypodocarpa-8,11,13-trien-3-one (46)*, has been prepared via the 3a-alcohol (48) formed byopening of the 3a,4a-epoxide (13) with lithium diethylamide.The total synthesis of the methyl ether of the naturalproduct, (+)-hinokione, has been achieved by a similar sequenceinvolving prior addition of an isopropyl group at C 13 of the methoxyacid (4) ( Scheme 1 ) .A study of the boron trifluoride rearrangements of thethree epoxides (12), (13), and (14), has been made using benzene anddimethyl sulphoxide as solvents.The stereochemistry of a series of 6-bromo-7-oxoderivatives of diterpenoids possessing an aromatic ring-C is discussedand the assignment of configuration of the 6-bromo substituents fromn.m.r. and n.0.e. data is examined.A preliminary investigation into the possibility ofpreparing a 9a-methyl steroidal analogue by addition of acyclopentatone ring across positions 3 and 4 of ring-A of thepodocarpic system is also reported." @default.
- W1176484772 created "2016-06-24" @default.
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- W1176484772 date "1971-01-01" @default.
- W1176484772 modified "2023-09-24" @default.
- W1176484772 title "Stereospecific Syntheses from Podocarpic Acid" @default.
- W1176484772 hasPublicationYear "1971" @default.
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