Dilithiation of 1-hydroxy-5-aryltetrazoles with 2 equiv. of butyllithium in the presence of N,N,N'N'-tetramethylethylenediamine enables the introduction of ortho-substituents into the aryl ring to form compounds (6a e). The hydroxy group of 1-hydroxy-5-phenyltetrazole may be masked by alkylation with 9-anthrylmethyl chloride. The masking group is removed with 1,4-diazabicyclo[2.2.2] octane or migrated to N 3 by treatment with trifluoroacetic acid to form the N-oxide (10).
Dilithiation of 1-hydroxy-5-aryltetrazoles with 2 equiv. of butyllithium in the presence of N,N,N'N'-tetramethylethylenediamine enables the introduction of ortho-substituents into the aryl ring to form compounds (6a e). The hydroxy group of 1-hydroxy-5-phenyltetrazole may be masked by alkylation with 9-anthrylmethyl chloride. The masking group is removed with 1,4-diazabicyclo[2.2.2] octane or migrated to N 3 by treatment with trifluoroacetic acid to form the N-oxide (10).
1-Benzyloxy-5-phenyltetrazole derivatives highly active against androgen receptor-dependent prostate cancer cells
作者:Shiting Zhao、Abdelsalam S. Ali、Xinyu Kong、Yan Zhang、Xiaomin Liu、Melissa A. Skidmore、Craig M. Forsyth、G. Paul Savage、Donghai Wu、Yong Xu、Craig L. Francis