the synthesis of cyclic 3-aryl- and heteroaryl-substituted 1,2-dicarbonyl compounds with different ring sizes by using a Suzuki cross-couplingreaction between 3-halo-1,2-dicarbonyl compounds and arylboronic acids is developed. The 3-halo-1,2-dicarbonyl substrates are easily available from 1,2-dicarbonyl compounds. The method is versatile, affording good to high yields of the target compounds. A method
[EN] SYNTHETIC METHODS OF PREPARING ESKETAMINE<br/>[FR] PROCÉDÉS SYNTHÉTIQUES DE PRÉPARATION D'ESKÉTAMINE
申请人:JANSSEN PHARMACEUTICA NV
公开号:WO2020212510A1
公开(公告)日:2020-10-22
The present invention is directed to methods for the asymmetric synthesis of esketamine. The present invention is further directed to key intermediates in the asymmetric esketamine synthesis. In one embodiment, the invention is an asymmetric synthesis of esketamine comprising the conversion of (S)-2'-chloro-2-methoxy-3,4,5,6-5 tetrahydro-[1,1'-biphenyl]-3-yl carbamate to (S)-2'-chloro-1-isocyanato-6-methoxy- 1,2,3,4-tetrahydro-1,1'-biphenyl.