Synthesis of Oxazolidines, Thiazolidines, and 5,6,7,8-Tetrahydro-1<i>H</i>,3<i>H</i>-pyrrolo[1,2-<i>c</i>]oxazole (or thiazole)-1,3-diones from β-Hydroxy- or β-Mercapto-α-amino Acid Esters
作者:Mahmoud Zarif Amin Badr、Morsy Mohamed Aly、Atiat Mohamed Fahmy、Mansour Esmael Younis Mansour
DOI:10.1246/bcsj.54.1844
日期:1981.6
2-Aryl-4-(ethoxycarbonyl)oxazolidines and thiazolidines (1) were prepared from the corresponding α-amino acid ethyl esters containing either hydroxyl or mercapto groups in the β-position by fusion with some aromatic aldehydes. Dehydrogenation of 1 with N-bromosuccinimide gave the corresponding oxazoles and thiazoles. The oxazolidines and thiazolidines gave Mannich bases on interaction with p-nitrobenzaldehyde
2-Aryl-4-(乙氧羰基)恶唑烷和噻唑烷 (1) 是由相应的 α-氨基酸乙酯通过与一些芳香醛融合而在 β 位含有羟基或巯基而制备的。1 用 N-溴代琥珀酰亚胺脱氢得到相应的恶唑和噻唑。恶唑烷和噻唑烷通过与对硝基苯甲醛和哌啶的相互作用产生曼尼希碱。1 的乙酰化得到相应的 N-乙酰基衍生物,在无水 ZnCl2 存在下融合发生环化,得到相应的双环化合物 5,6,7,8-四氢-1H,3H-吡咯并[1,2-c]恶唑(或噻唑)-1,3-二酮。