Inhibitors of Acyl-CoA:Cholesterol <i>O</i>-Acyltransferase. Synthesis and Pharmacological Activity of (±)-2-Dodecyl-α-phenyl-<i>N</i>-(2,4,6-trimethoxyphenyl)-2<i>H</i>-tetrazole-5-acetamide and Structurally Related Tetrazole Amide Derivatives
作者:Patrick M. O'Brien、Drago R. Sliskovic、Joseph A. Picard、Helen T. Lee、Claude F. Purchase、Bruce D. Roth、Andrew D. White、Maureen Anderson、Sandra Bak Mueller、Thomas Bocan、Richard Bousley、Katherine L. Hamelehle、Reynold Homan、Peter Lee、Brian R. Krause、J. F. Reindel、Richard L. Stanfield, and、Daniel Turluck
DOI:10.1021/jm960170f
日期:1996.1.1
for their ability to inhibit acyl-CoA: cholesterolO-acyltransferase (ACAT) in vitro and to lower plasma total cholesterol in vivo. For this series of compounds, our objective was to systematically replace substituents appended to the amide and tetrazole moieties of 1 with structurally diverse functionalities and assess the effect that these changes have on biological activity. The ensuing structure-activity
mesoporous silica with mild Brönsted acid properties, has been used as an efficient, metal-free, heterogeneous catalyst for the click synthesis of 5-benzyl and 5-aryl-1H-tetrazoles from nitriles in DMF at 90 °C. This catalyst offers advantages including ease of operation, milder conditions, high yields, and reusability. Studies are presented that demonstrate the robust nature of the catalyst under the
Lithiation Substitution of Unprotected Benzyltetrazoles
作者:Jeff Y. F. Wong、Agnieszka Lewandowska、Benjamin R. Trowse、Graeme Barker
DOI:10.1021/acs.orglett.9b02633
日期:2019.9.6
N-alkyl-protecting group, precluding the products from use as carboxylate bioisosteres, the major role of tetrazoles in pharmaceuticals. We herein report a convenient, protecting-group-free lithiation-substitution protocol for benzylic tetrazoles. Metalation with n-BuLi at 0 °C followed by electrophilic trapping gave a range of α-functionalized benzyltetrazoles in up to 91% yield.