abstract |
Provided herein are improved processes for the synthesis of substituted tetrahydro beta-carboline derivatives. In particular, provided herein are improved processes useful for the preparation of (S)-4-chlorophenyl 6-chloro- 1 -(4-methoxyphenyl)-3,4-dihydro- 1 H-pyrido [3,4-b]indole-2(9H)-carboxylate. Formula (I) |