Regioselective reduction of N-alkyl-3-sulfonyl glutarimides. Synthesis of 3,4-dihydro-3-tosylpyridin-2-ones
作者:Bo-Rui Chang、Chung-Yi Chen、Nein-Chen Chang
DOI:10.1016/s0040-4039(02)00446-x
日期:2002.4
Treatment of N-alkyl-3-sulfonyl glutarimides (1) with sodium hydride and then lithium aluminum hydride could give regioselective reduced hydroxy piperidones (5) which were further dehydrated to 3,4-dihydro-3-tosylpyridin-2-ones (6) in the presence of boron trifluoride.
用氢化钠然后氢化铝锂处理N-烷基-3-磺酰基戊二酰亚胺(1),然后生成区域选择性的还原羟基哌啶酮(5),将其进一步脱水成3,4-二氢-3-甲苯磺酰基吡啶-2-酮(6))在三氟化硼的存在下。