Microwave-Assisted Stereoselective 1,3-Dipolar Cycloaddition of C,N-Diarylnitrone (i.e., N-(Arylmethylidene)benzenamine N-Oxide) and Bis(arylmethylidene)acetone (=1,5-Diarylpenta-1,4-dien-3-one): NMR and Crystal Analysis of Diastereoisomeric Bis(isoxazoli
作者:Nidhin Paul、Selvam Kaladevi、Shanmugam Muthusubramanian
DOI:10.1002/hlca.201100263
日期:2012.1
Microwave‐assisted stereoselective 1,3‐dipolar cycloaddition of C,N‐diarylnitrones (i.e., N‐(arylmethylidene)benzenamine N‐oxides) 2 to substituted bis(arylmethylidene)acetones (=1,5‐diarylpenta‐1,4‐dien‐3‐ones) 1 leading to diastereoisomer pairs of bis‐isoxazolidines 3 and 4 in good to excellent yield is described (Scheme 2 and Table 2). The configuration outcome of the reaction is discussed based on the NMR and
微波辅助将C,N-二芳基硝酮(即N-(芳基亚甲基)苯甲胺N-氧化物)2立体选择性1,3-偶极环加成(= 1,5-二芳基戊-1,4-丁) ‐3‐ones)1描述了以良好或优异的收率生成双异氰酸酯3和4的非对映异构体对(方案2和表2)。基于产物的NMR和X射线数据讨论了反应的构型结果。