Photoinduced diastereoselective pinacolisation of 4-oxo-4-phenylbutanamides to 4,5-dihydroxy-4,5-diphenyloctanediamides
作者:Ute Lindemann、Markus Neuburger、Margareta Neuburger-Zehnder、Dirk Wulff-Molder、Pablo Wessig
DOI:10.1039/a905040j
日期:——
The photoinduced pinacolisation of 4-oxo-4-phenylbutanamides 1 afforded 4,5-dihydroxy-4,5-diphenyloctanediamides 2 and 3 with unusual diastereoselectivities up to 83%, which depends on the amide substituent. In this reaction the solvent diethyl ether acts as a hydrogen donor. The structures of pinacols 2 and 3 were confirmed by X-ray analyses. Possible reasons for the diastereoselectivity and the preferred
对4-氧代-4-苯基丁酰胺1进行光诱导的松果醇化反应,得到4,5-二羟基-4,5-二苯基辛烷二酰胺2和3,其非对映异构选择性高达83%,这取决于酰胺取代基。在该反应中,溶剂二乙醚充当氢供体。X射线分析证实了品高醇2和3的结构。讨论了非对映选择性和优选从溶剂中提取分子间氢的可能原因。通过晶体结构确定将4-氧代-4-苯基丁酸4辐射后获得的产物5和6鉴定为2,2'-二苯基四氢[2,2']双呋喃基-5,5'-二酮。