摘要:
This disclosure describes novel 2,5-dihydro-2,5-dialkoxyfuran derivatives useful as intermediates for the preparation of the natural prostaglandins and their congeners.
摘要:
DL-Tartaric acid is produced by hydrolysis of epoxysuccinic acid by the process, comprising contacting an aqueous epoxysuccinic acid solution with a catalyst containing activated charcoal, aluminum oxide or ferric oxide which is substantially insoluble in said solution. Conversion of epoxysuccinic acid as well as selectivity to dl-tartaric acid are very high.
摘要:
Solutions of monomeric trivalent antimony-tartaric acid compounds having a molar ratio of antimony to tartaric acid of 1 to 1 to 2 to 1 stabilized with an anion such as chloride in certain polar organic solvents are useful for incorporating flame-retarding antimony compounds into polymeric articles.
摘要:
The present invention relates to salt and crystal form of an EGFR inhibitor, and a composition and the use thereof. The salt and crystal form of the EGFR inhibitor as represented by formula I of the present invention can be used for treating or preventing epidermal growth factor receptor-mediated diseases or medical conditions (such as L858R activation mutants, exon 19 deletion activation mutants, T790M resistance mutants and C797S resistant mutants) in certain mutant forms.
摘要:
The present invention relates to the stereospecific synthesis of (R)-5-((E)-2-pyrrolidin-3-ylvinyl)pyrimidine, its salt forms, and novel polymorphic forms of these salts.