作者:R. H. Good、Gurnos Jones
DOI:10.1039/j39700001938
日期:——
A synthesis of 2-substituted oxazolo[3,2-a]pyridinium salts is described. The appropriate 2-(4-ethoxybutyryl)-oxazoles are treated with hydrobromic acid and then cyclised and aromatised by boiling acetic anhydride. Attempts to prepare 2-substituted oxazoles suitable for the synthesis of the parent oxazolopyridinium ion have been unsuccessful. Catalytic reduction of two oxazolopyridinium salts leads
描述了2-取代的恶唑并[3,2- a ]吡啶鎓盐的合成。用氢溴酸处理适当的2-(4-乙氧基丁酰基)-恶唑,然后环化并通过沸腾乙酸酐使其芳香化。尝试制备适合于母体恶唑吡啶鎓离子合成的2-取代的恶唑是失败的。两种恶唑并吡啶鎓盐的催化还原导致开环,得到N-取代的2-哌啶酮。