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PROCESS FOR PREPARING MeO-Peg-PROTECTED DIHYDROQUININE OR DIHYDROQUINIDINE DERIVATIVES, DIHYDROQUININE OR DIHYDROQUINIDINE DERIVATIVES AND THEIR USE
PROCESS FOR PREPARING MeO-Peg-PROTECTED DIHYDROQUININE OR DIHYDROQUINIDINE DERIVATIVES, DIHYDROQUININE OR DIHYDROQUINIDINE DERIVATIVES AND THEIR USE
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机译:制备Meo-Peg保护的双氢奎宁或双氢奎宁衍生物,双氢奎宁或双氢奎宁衍生物的方法及其用途
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摘要
Process for the formation of MeO-Peg-protected dihydroquinine or dihydro quinindine derivatives, new dihydroquinine-or dihyroquinidine derivatives as well as the use thereof. It is known that dihydroquinine or dihydroquinidine derivatives can be successfully used as ligands in the enantioselective dihydroxylation. The new disclosed ligand systems based on dihydroquinine/quinidine, unlike the prior art ligands, can be recycled after enantioselective dihydroxylation by precipitating and filtering the reaction medium, and be reused in the reaction medium. Also disclosed are the ligand systems (I) and (IV), process for preparing the same and their use in the enantioselective dihydroxiation of double bonds.
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