作者:Steven W. Goldstein、Paul J. Dambek
DOI:10.1055/s-1989-27209
日期:——
The addition of various organometallic reagents to quinoline occurred solely at the 2-position of the heteroaromatic ring. The resultant 2-substituted 1,2-dihydroquinolines were then easily reduced with sodium in ethanol to the 1,2,3,4-tetrahydro species. The overall transformation of quinoline to 2-substituted 1,2,3,4-tetrahydroquinolines was found to be favorable to the previous literature conditions, which required an intermediate oxidative step. The yields for the last step ranged from 42-98% but were generally greater than 80%.
将各种有机金属试剂添加到喹啉中,仅发生在杂环芳香环的2位。由此得到的2-取代的1,2-二氢喹啉随后可在乙醇中用钠轻松还原为1,2,3,4-四氢喹啉。喹啉转化为2-取代的1,2,3,4-四氢喹啉的总体过程,相较于之前文献条件(需要中间的氧化步骤),被发现更为有利。最后一步的产率范围为42-98%,但通常大于80%。