申请人:Drexel University
公开号:US05789599A1
公开(公告)日:1998-08-04
Novel N-sulfinyl-2-carboxyaziridine compounds and novel N-hydrogen-2-hydroxymethylaziridine compounds are provided. The asymmetric synthesis of N-sulfinylaziridines is readily accomplished in high diastereomeric purity and good yield by the Darzens-type reaction of the metal enolate of an .alpha.-haloester and an enantiopure sulfinimine. Ring-opening of these aziridines affords .alpha.-amino acids and the otherwise difficult to prepare syn-.beta.-hydroxy-.alpha.-amino acids, both key structural units found in many bioactive materials. The N-sulfinyl radical may be selectively removed from the novel aziridine compounds by treatment with acid or base. Alternatively, the N-sulfinyl radical may be oxidized to provide the corresponding N-sulfonyl-aziridine, or reduced to form the corresponding 1H-2-hydroxymethylaziridine, either of which may subsequently be ring-opened to provide precursors to bioactive compounds.
本发明提供了新型N-亚磺酰基-2-羧基环氧丙烷化合物和新型N-氢基-2-羟甲基环氧丙烷化合物。通过α-卤代酯金属烯醇和手性亚磺酰胺的Darzens型反应,可以高度对映异构纯度和良好收率地实现N-亚磺酰基环氧丙烷的不对称合成。这些环氧丙烷的开环反应可得到α-氨基酸和通常难以制备的合成β-羟基-α-氨基酸,这两种结构单元是许多生物活性物质的重要组成部分。新型环氧丙烷化合物中的N-亚磺酰自由基可以通过酸或碱处理进行选择性去除。或者,N-亚磺酰自由基可以氧化为相应的N-磺酰基-环氧丙烷,或还原为相应的1H-2-羟甲基环氧丙烷,随后可以开环形成生物活性化合物的前体。