Preparation of 5-Substituted 1<i>H</i>-Tetrazoles Catalyzed by Scandium Triflate in Water
作者:Adiel Coca、Evan Turek、Liana Feinn
DOI:10.1080/00397911.2014.957775
日期:2015.1.17
Abstract Several 5-substituted1H-tetrazoles were prepared in water or isopropanol/water mixtures using microwave heating. Good yields were obtained for the [2 + 3] cycloaddition of sodium azide with aryl nitriles, aliphatic nitriles, and vinyl nitriles when catalyzed by scandium triflate. The reactions were typically heated for 1 h at 160 °C in a 3:1 isopropanol/water mixture to obtain the best yields
Syntheses of 5-Substituted 1H-tetrazoles Catalyzed by Reusable Cu(II)-NaY Zeolite from Nitriles
作者:K. Sudhakar、B. Purna Chandra Rao、B. Prem Kumar、M. Suresh、S. Ravi
DOI:10.14233/ajchem.2017.20337
日期:——
Cu(II)-NaY heterogeneous catalyst is used for the synthesis of 5-substituted 1H-tetrazoles by [2+3]-cycloaddition of sodium azide and nitriles. The salient features of this process are low reaction times, mild reaction conditions and high yields. The catalyst is recovered and reused for several cycles with consistent activity.
Novel 1-Benzyl-4-Piperidinamines that are Useful in the Treatment of COPD and Asthma
申请人:Hemmerling Martin
公开号:US20100081692A1
公开(公告)日:2010-04-01
The invention provides 1-benzyl-4-piperidinamines of the general formula (I), processes for their preparation, pharmaceutical compositions containing them and their use in therapy. The compounds are useful in the treatment of respiratory diseases such as chronic obstructive pulmonary disease and asthma. The compounds are inhibitors of the CCR1 receptor.