作者:Siren Neset、Håkon Hope、Kjell Undheim
DOI:10.1016/s0040-4020(97)00657-1
日期:1997.7
constrained bis(glycines) as trans derivatives of cyclopropane have been prepared in stereoselective syntheses. (S)-4-Benzyl-2-oxazolidinone was used as a chiral auxiliary, trisyl azide was the electrophilic source of amine nitrogen. Four stereogenic centers were created. A related cis-cyclopropane derivative suffered ring closure with formation of a bicyclo[3.1.0]hex-3-one derivative. X-ray data for
已经在立体选择性合成中制备了作为环丙烷的反式衍生物的构象受限的双(甘氨酸)。(S)-4-苄基-2-恶唑烷酮用作手性助剂,叠氮化三甲苯是胺氮的亲电子源。创建了四个立体成因中心。相关的顺式-环丙烷衍生物发生闭环,形成双环[3.1.0] hex-3-one衍生物。后者和(1S,2S)-1,2-双(1S)-叠氮基-2-氧代-2 [(4S)-苄基-2-氧代-3-恶唑烷基]-乙基}的X射线数据给出了环丙烷0615 0221。