摘要
以(2R)-3-[(3S,4R)-1-(叔丁基二甲基硅氧基)乙基]-4-乙酰氧基氮杂环丁-2-酮为母体,2-溴乙(丙)酸酯或2-溴丙酰胺为亲核试剂,通过Reformatsky反应合成了一系列新型的1-β-碳氢霉烯类抗生素中间体——3-{(2R)-2-[(3S,4R)-1-(叔丁基二甲基硅氧基)乙基]氮杂环丁-2-酮-4-基}乙(丙)酸酯(3a~3d)和3-{(2R)-2-[(3S,4R)-1-(叔丁基二甲基硅氧基)乙基]氮杂环丁-2-酮-4-基}-N,N-二取代丙酰胺(3e,3i和3k),其结构经1H NMR和13C NMR表征,其中3a~3e和3i未见文献报道。
A series of novel intermediates of 1-β-methyl earbapenem antibiotics, 3-[ (2R)-2-{( 3S, 4R) -4-acetoxy-3-[ (R) -1-(t-butyldimethylsilyloxy) ] ethyl } azetidin-2-one-4-yl ] acetic ( or propionic ) acid esters ( 3a - 3d) and 3-[ ( 2R ) -2-{ ( 3S, 4R ) -4-acetoxy-3-[ ( R ) -I -( t-butyldimethylsilyloxy ) ] ethyl} azetidin-2-one-4-yl]-N,N-disubstitute-propionic amides(3e, 3i and 3k), were synthesized by Reformatsky reaction of (3S,4R)-4-acetoxy-3-[ (R)-1-(t-butyldimethylsilyloxy)ethyl] azetidin-2-one with 2-bromacetic acid ester, 2-brompropionic acid ester or 2-brompropionic amide. The structures were characterized by 1H NMR and 13C NMR. 3a - 3e and 3i were new compounds.
出处
《合成化学》
CAS
CSCD
北大核心
2012年第3期352-355,共4页
Chinese Journal of Synthetic Chemistry