منابع مشابه
Total synthesis of antimalarial diterpenoid (+)-kalihinol A.
Total synthesis of antimalarial diterpenoid (+)-kalihinol A, isolated from marine sponge Acanthella sp., is achieved. This total synthesis involves regioselective alkylation of an epoxide, construction of a tetrahydropyran ring by iodo-etherification, construction of a cis-decalin ring by intramolecular Diels-Alder reaction, isomerization of cis-decalin to trans-decalin, and subsequent function...
متن کاملEnantioselective total synthesis of marine diterpenoid clavulactone.
The key steps in the synthesis of clavulactone are formation of an enantiopure cyclopentane precursor by epoxide rearrangement and intramolecular carbonyl-ene reaction, construction of the 3,4-dihydro-2H-pyran ring by intermolecular hetero-Diels-Alder reaction, closure of the eleven-membered ring, and finally generation of the lactone functionality by chemoselective allylic C(sp(3))-H oxidation.
متن کاملTotal synthesis of the hallucinogenic neoclerodane diterpenoid salvinorin A.
Total synthesis of salvinorin A (1), a neoclerodane diterpenoid having the most potent hallucinogenic activity and a selective kappa-opioid agonist, was completed in 20 steps starting from enantiomerically pure hydroxy-Wieland-Miescher ketone 5.
متن کاملModel studies toward the synthesis of the bioactive diterpenoid, harringtonolide.
In model studies towards the synthesis of harringtonolide, the construction of the tropone moiety via arene cyclopropanation was investigated. The installation of the lactone ring was accomplished by way of a Diels-Alder cycloaddition of various indenones and a-pyones. The incorporation of the key bridge methyl group and subsequent control of its stereochemistry is also outlined.
متن کاملTotal synthesis of phalarine.
rearrangement were elucidated and we assumed that a total synthesis of 1would be a straightforwardmatter. As described below, we were indeed able to accomplish the inaugural total synthesis of phalarine using the rearrangement strategy, although significant obstacles had to be overcome. For a total synthesis of phalarine, it would be best if the rearrangement could be conducted on an advanced-s...
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ژورنال
عنوان ژورنال: Agricultural and Biological Chemistry
سال: 1971
ISSN: 0002-1369,1881-1280
DOI: 10.1271/bbb1961.35.918