| abstract |
The invention relates to a preparation method of an indoleamine 2,3-dioxygenase inhibitor and an intermediate thereof. The invention discloses an industrialized preparation method, which solves the problems of long synthesis route, low yield and unsuitability for industrialization in the prior art. The present invention also relates to some intermediates for the formation of indoleamine 2,3-dioxygenase inhibitors, especially intermediates of general formula (I). |