Finally, a feasible two-step reduction method was developed from the study of 6-methyl-9-methyl-1,2,3,9- tetrahydro-4H-carbazol-4-oxime(9).

• 采用多种方法进行肟的还原尝试，最后通过对6-甲氧基-9-甲基-1,2,3,9-四氢-4H-咔唑-4-肟(9)的还原研究，找到合适的两步还原肟的方法。