66767-62-2Relevant articles and documents
Glycolipid ester-type heterodimers from Ipomoea tyrianthina and their pharmacological activity
Leon-Rivera, Ismael,Miron-Lopez, Gumersindo,Estrada-Soto, Samuel,Aguirre-Crespo, Francisco,Gutierrez, Maria del Carmen,Molina-Salinas, Gloria Maria,Hurtado, Gerardo,Navarrete-Vazquez, Gabriel,Montiel, Elizur
, p. 4652 - 4656 (2009)
Tyrianthins A (1) and B (2), two new partially acylated glycolipid ester-type heterodimers were isolated from Ipomoea tyrianthina. Scammonic acid A was determined as the glycosidic acid in both monomeric units. Tyrianthin A (1) (IC50 0.24 ± 0.0
Methods for preparing antiviral calanolide compounds
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Example 14, (2008/06/13)
The present invention relates to methods for preparing 2,2-dimethyl-5-acyloxy-10-propyl-2H,8H-benzo[1,2-b:3,4-b′]dipyran-8-one (5) and 2,2-dimethyl-5-hydroxy-10-propyl-2H,8H-benzo[1,2-b:3,4-b′]dipyran-8-one (6) and their use as intermediates for the synthesis of antiviral calanolide compounds. For example, Fries rearrangement on compound 5 or Friedel-Crafts reaction on 6, yields intermediate 2,2-dimethyl-5-hydroxy-6-propionyl-10-propyl-2H,8H-benzo[1,2-b:3,4-b′]dipyran-8-one (4), which, in turn, can be converted to (+)-calanolide A and (?)-calanolide B. The coupling of compound 6 with the appropriate chiral molecule under Mitsunobu or nucleophilic displacement leads to the asymmetric synthesis of antiviral calanolide compounds.
CHIRAL PROPIONATE ENOLATE EQUIVALENTS FOR THE STEREOSELECTIVE SYNTHESIS OF THREO- OR ERYTHRO-α-METHYL-β-HYDROXY ACIDS.
Davies, Stephen G.,Dordor-Hedgecock, Isabelle M.,Warner, Peter
, p. 2125 - 2128 (2007/10/02)
The aluminium and copper enolates derived from (n5-C5H5)Fe(CO)(PPh3)COCH2CH3 are chiral propionate enolate equivalents which on reaction with aldehydes (RCHO, R=Me, Et, iPr, tBu) provide stereoselective sytheses of threo-
