abstract |
PCT No. PCT/DE92/00551 Sec. 371 Date Mar. 8, 1993 Sec. 102(e) Date Mar. 8, 1993 PCT Filed Jul. 1, 1992 PCT Pub. No. WO93/01168 PCT Pub. Date Jan. 21, 1993.A process for the production of indole derivatives, which is characterized in that in the presence of phosphoric acid a substitution with an imine is performed, and intermediate products of this process and the production of these intermediate products are described. |