N 7-Tosyltheophylline (TsTh): A Highly Efficient Reagent for the One-Pot Synthesis of N 7-Alkyltheophyllines from Alcohols
摘要:
A convenient and highly efficient one-pot N-alkylation of theophylline from alcohols via N-7-tosyltheophylline (TsTh) is described. In this protocol, the treatment of primary and/or secondary alcohols with a mixture of TsTh and 1,8-diazabicyclo[5.4.0]undec-7-ene in refluxing acetonitrile affords the corresponding N-7-alkyltheophylline in good to excellent yields; the reaction was optimized for solvent and base. This methodology is highly efficient for various structurally diverse primary and secondary alcohols. A plausible mechanism for the one-pot N-alkylation of theophylline with alcohols via TsTh has been suggested.
2-AMINO-4-ARYLTHIAZOLE COMPOUNDS AS TRPAI ANTAGONISTS
申请人:Kumar Sukeerthi
公开号:US20120157411A1
公开(公告)日:2012-06-21
The present invention is related to 2-amino-4-arylthiazole derivatives as TRPA (Transient Receptor Potential subfamily A) modulators. In particular, compounds described herein are useful for treating or preventing diseases, conditions and/or disorders modulated by TRPA1 (Transient Receptor Potential subfamily A, member 1). Also provided herein are processes for preparing compounds described herein, intermediates used in their synthesis, pharmaceutical compositions thereof, and methods for treating or preventing diseases, conditions and/or disorders modulated by TRPA1.
The invention relates to compounds of formula I:
and pharmaceutically acceptable salts thereof wherein A, X, R
1
, R
4
and n are as defined herein. In addition, the present invention relates to methods of manufacturing and methods of using the compounds of formula I as well as pharmaceutical compositions containing such compounds. The compounds may be useful in treating diseases and conditions mediated by TRPA1, such as pain.
Disclosed are a series of hydroxyl purine compounds and the use thereof as PDE2 or TNFα inhibitors, in particular, the compounds as shown in formula (I), or tautomers or pharmaceutically acceptable salts thereof.
Synthesis and characterization of amino-NHC coinage metal complexes and application for C–H activation of caffeine
作者:Hsuan-Jui Huang、Wei-Chih Lee、Glenn P.A. Yap、Tiow-Gan Ong
DOI:10.1016/j.jorganchem.2014.02.024
日期:2014.7
This paper describes the synthesis and characterization of silver, copper and gold complexessupported by several amino-NHC ligands with different amino side arms. The transmetallation process using silver-NHC complexes can be used to prepare amino-NHC copper and gold complexes easily in high yield. In addition, the catalytic activities of coppercomplexes are examined for arylation of caffeine via