Development Summary towards a Manufacturable Process for R 83842 [(<i>S</i>)-6-[(4-chlorophenyl) (1H-1,2,4-triazol-1-yl)methyl]-1-methyl-1H-benzotriazole]
作者:A. G. M. De Knaep、A. M. J. Vandendriessche、D. J. E. Daemen、J. J. Dingenen、K. D. Laenen、R. L. Nijs、F. L. J. Pauwels、D. F. Van den Heuvel、F. J. Van der Eycken、R. W. E. Vanierschot、G. M. L. W. van Laar、W. L. A. Verstappen、B. L. A. Willemsens
DOI:10.1021/op990081n
日期:2000.5.1
A scalable process to produce enantiomeric R 83842, (S)-6-[(4-chlorophenyl) (1H-1,2,4-triazol-1-yl)methyl]-1-methyl-1H-benzotriazole, is developed and described as a lecture* transcript. Cheap and safe reagents have been used. A typical procedure for oxidative destruction of aqueous cyanide waste, and stability data on N-acetyl hydrazine are provided. Special focus is on cost analysis as an important tool in developing performant synthetic methods. The method consists of preparing a chiral monosubstituted hydrazine which is ring closed to the chiral 1-alkylated 1,2,4-triazole title compound.