Synthesis of Functionalized Azetidines through Chemoselective Zinc-Catalyzed Reduction of β-Lactams with Silanes
作者:Benito Alcaide、Pedro Almendros、Cristina Aragoncillo、Gonzalo Gómez-Campillos
DOI:10.1002/adsc.201300320
日期:2013.7.8
their corresponding functionalized azetidines has been developed. This approach takes advantage of the selective reduction of the 2‐azetidinone nucleus with hydrosilanes in the presence of a zinc‐based catalyst. The methodology is tolerant towards sensitive groups such as allene, ester, and cyanohydrin moieties. In addition, the process allows the preparation of enantiopure azetidines without erosion of
已开发出一种有效的方法,可将β-内酰胺一步转化为相应的官能化氮杂环丁烷。该方法利用了在锌基催化剂存在下用氢硅烷选择性还原2-氮杂环丁酮核的优势。该方法耐受敏感基团,例如丙二烯,酯和氰醇部分。另外,该方法允许制备对映体纯的氮杂环丁烷,而不会损害立体化学完整性。已经提出了涉及氮杂环丁鎓盐中间体的催化循环。