摘要:
The invention discloses novel processes for production, enrichment and/or isolation of alpha-tocotrienol from source material comprising at least one non-alpha-tocotrienol, such as natural extracts comprising mixed tocotrienols.
摘要:
Intermediates in the preparation of epothilones and epothilone analogs are provided along with synthetic methods useful in the synthesis of epothilone compounds
摘要:
The present invention provides crystalline polymorphs of docetaxel and processes for preparing them, a method for preparing amorphous docetaxel, and a process for preparing docetaxel.
摘要:
The invention relates to a process for the preparation of Fumagillin by liberation from its salt characterized by reacting Fumagillin dicyclohexylamine salt with an organic acid in alcoholic medium. According to the process Fumagillin can be produced in high yield and pure condition and with higher stability than products obtained by other preparation methods.
摘要:
The present invention relates to novel dihydropyrones with tethered heterocycles having improved pharmacologic properties which potently inhibit the HIV aspartyl protease blocking HIV infectivity. The dihydropyrones are useful in the development of therapies for the treatment of viral infections and diseases, including AIDS. The present invention is also directed to methods of synthesis of the dihydropyrones and intermediates useful in the preparation of the final compounds.
摘要:
The present invention is directed to a process for the preparation of l,3:2,4-bis (4- methylbenzylidene) sorbitol (MDBS) and 1,3:2,4-bis (4-dimethylbenzylidene) sorbitol (DMDBS) by dehydrocondensating an aldehyde and an alditol using a hydrophobic ionic liquid as an acid catalyst. The ionic liquid used in the accordance with the process of the present invention is a phosphonium ion based ionic liquid.
摘要:
This invention is directed to a process for preparation of acetal derivatives, 1,3:2,4-bis (3,4-dimethylbenzylidene) sorbitol (DMDBS) and 1,3:2,4-bis (4-methylbenzylidene) sorbitol (MDBS) by carrying out a dehydrocondensation reaction by betweeen an aldehyde and an alditol using an aqueous ionic fluid as the acid catalyst.
摘要:
The present invention relates to synthesis of C 11 natural ginkgolide derivatives and C 11 f-seco-gingkolide derivatives from the corresponding lactols which are selectively obtained using NaBH 4 .