REDUCTION OF 1-(3,5-DI-<i>TERT</i>-BUTYL-2-HYDROXYPHENYL)PYRIDINIUM HALIDES WITH RANEY Ni–Al ALLOY IN AN ALKALINE SOLUTION AFFORDING 2,4-DI-<i>TERT</i>-BUTYLBENZOXAZOLO[3,2-<i>a</i>]-5a,6,7,8,9,10-HEXAHYDROPYRIDINES
作者:Gouki Fukata、Takashi Itoh、Masashi Tashiro
DOI:10.1246/cl.1981.1345
日期:1981.10.5
Treatment of 1-(3,5-di-tert-butyl-2-hydroxyphenyl)pyridinium halides (1a–1c) with Raney Ni–Al alloy in an alkaline solution afforded the corresponding 2,4-di-tert-butylbenzoxazolo[3,2-a]-5a,6,7,8,9,10-hexahydropyridines (4a–4c). In the case of 1b, 2,4-di-tert-butylbenzoxazolo [3,2-a]-5a,6,7,10-tetrahydro-8-methylpyridine (5) was also obtained as a by-product.
在碱性溶液中用 Raney Ni-Al 合金处理 1-(3,5-二叔丁基-2-羟基苯基)吡啶鎓 (1a-1c) 得到相应的 2,4-二叔丁基苯并恶唑[3] ,2-a]-5a,6,7,8,9,10-六氢吡啶 (4a–4c)。在1b的情况下,2,4-二叔丁基苯并恶唑并[3,2-a]-5a,6,7,10-四氢-8-甲基吡啶(5)也作为副产物得到。