专利号:EP-0442576-A1 优先权日:1990-02-13 标 题:Synthesis of cis-beta-lactams with the aid of an alkali metal compound 发明人:VAN KOTEN GERARD; VAN DER STEEN FREDERIK HENDRIK; JASTRZEBSKI JOHANN TONNS BARTH; KLEIJN HENK 权利人:UNIV UTRECHT 摘要:A synthesis of cis -β-lactams in a nearly quantitative yield by a condensation reaction of an alkali metal enolate, a substituted glycine ester and an alkali metal base, with an activated imine, is provided.
专利号:US-8207358-B2 优先权日:2005-11-04 标 题:Methods for the preparation of taxanes using chiral auxiliaries 发明人:LOURDUSAMY METTILDA; CARON GAETAN 权利人:LOURDUSAMY METTILDA; CARON GAETAN; ACCORD HEALTHCARE LTD 摘要:The present invention relates to a stereoselective synthesis of novel β-lactam dimers as useful precursors for the preparation of paclitaxel, docetaxel, and analogues thereof. More particularly, the new β-lactams are prepared from readily available and enantiomerically pure chiral auxiliaries. The β-lactams are then reacted with a suitably protected taxane to produce diastereomerically enriched side chain-bearing taxanes. Finally, the chiral auxiliary is cleaved and protecting groups are removed to provide the desired taxane.
专利号:US-7541458-B2 优先权日:2005-06-10 标题:β-lactam synthesis 发明人:VU PHONG; HOLTON ROBERT A 权利人:UNIV FLORIDA STATE RES FOUND 摘要:The present invention is directed to a process for the preparation of β-lactams. Generally, an imine is cyclocondensed with a ketene acetal or enolate to form the β-lactam product in a “one potâ€? synthesis, this process is generally performed at a higher temperature than conventional processes.
专利号:JP-H04211092-A 优先权日:1990-02-13 标题 :Synthesis of cis-β-lactams with the aid of alkali metal compounds
专利号:CA-2036152-A1 优先权日:1990-02-13 标 题 :Synthesis of cis-beta-lactams with the aid of an alkali metal compound
专利号:MX-2007015593-A 优先权日:2005-06-10 标题:SYNTHESIS OF BETA-LACTAMA.