Les enols ethers du titre (A) 制备对三氟甲磺酸盐脱三烷基甲硅烷 和 α-重氮乙酰乙酸盐;l'action de l'acetoxy-4 t-丁基二甲基甲硅烷氧基-1'ethyl-3 azetidinone-2 sur les 组成一个导管辅助 α-重氮羟基-1'ethyl-3 oxo-4 azetidineacetylacetates-2
A simple method of preparing trimethylsilyl- and <i>tert</i>-butyldimethylsilyl-enol ethers of α-diazoacetoacetates and their use in the synthesis of a chiral precursor to thienamycin analogs
作者:Yasutsugu Ueda、Guy Roberge、Viviane Vinet
DOI:10.1139/v84-497
日期:1984.12.1
Les enols ethers du titre (A) sont prepares par action des trifluoromethanesulfonates de trialkylsilyle sur des α-diazoacetylacetates; l'action de l'acetoxy-4 t-butyldimethylsiloxy-1' ethyl-3 azetidinone-2 sur les composes A conduit aux α-diazo hydroxy-1' ethyl-3 oxo-4 azetidineacetylacetates-2
Les enols ethers du titre (A) 制备对三氟甲磺酸盐脱三烷基甲硅烷 和 α-重氮乙酰乙酸盐;l'action de l'acetoxy-4 t-丁基二甲基甲硅烷氧基-1'ethyl-3 azetidinone-2 sur les 组成一个导管辅助 α-重氮羟基-1'ethyl-3 oxo-4 azetidineacetylacetates-2
Carbapenem intermediates
申请人:Bristol-Myers Company
公开号:US04683296A1
公开(公告)日:1987-07-28
A new process is provided for preparing the key carbapenem intermediates of the formula ##STR1## wherein R.sup.5 and R.sup.6 each independently represent hydrogen or methyl and R.sub.1 represents a conventional carboxyl-protecting group.
A Catalytic Cross‐Olefination of Diazo Compounds with Sulfoxonium Ylides
作者:James D. Neuhaus、Adriano Bauer、Alexandre Pinto、Nuno Maulide
DOI:10.1002/anie.201809934
日期:2018.12.3
A ruthenium‐catalysed cross‐olefination of diazo compounds and sulfoxonium ylides is presented. Our reaction design exploits the intrinsic difference in reactivity of diazo compounds and sulfoxonium ylides as both carbene precursors and nucleophiles, which results in a highly selective reaction.