Enantiomers of 2-methyl-6-nitro-1,2,3,4-tetrahydroquinoline have been obtained by kinetic resolution of racemic 2-methyl-1,2,3,4-tetrahydroquinoline in acylation with acyl chlorides of N-protected amino acids followed by regioselective nitration of the diastereoisomeric amides and acidic hydrolysis. The introduction of a trifluoroacetyl protecting group into the position 1 of the enantio pure nitro
通过用N-保护的
氨基的酰
氯酰化酰化外消旋的2-甲基-
1,2,3,4-四氢喹啉,可以动态拆分2-甲基-
6-硝基-1,2,3,4-四氢喹啉的对映异构体。酸,然后将非对映异构酰胺进行区域选择性硝化并进行酸性
水解。将三
氟乙酰基保护基引入对映体纯
硝基化合物的1位,然后还原,得到(S)-6-
氨基-2-甲基-1-三
氟乙酰基-
1,2,3,4-四氢喹啉高产。