‘One-pot’ synthesis of 4-substituted 1,5-diaryl-1H-pyrazole-3-carboxylates via lithium tert-butoxide-mediated sterically hindered Claisen condensation and Knorr reaction
作者:Jian-An Jiang、Wei-Bin Huang、Jiao-Jiao Zhai、Hong-Wei Liu、Qi Cai、Liu-Xin Xu、Wei Wang、Ya-Fei Ji
DOI:10.1016/j.tet.2012.11.012
日期:2013.1
A concise ‘one-pot’ synthesis of a variety of 4-substituted 1,5-diaryl-1H-pyrazole-3-carboxylates has been developed in moderate to good yields with excellent regioselectivity. Less cost lithium tert-butoxide has been identified as a base for sterically hindered Claisencondensation to efficiently generate the labile 3-substituted 4-aryl-2,4-diketoesters. Furthermore, extensive studies lead to a ‘one-pot’
One-Pot Synthesis of Highly Substituted 1<i>H</i>-Pyrazole-5-carboxylates from 4-Aryl-2,4-diketoesters and Arylhydrazines
作者:Jiao-Jiao Zhai、Chun-Hui Gu、Ying Guo、Dao-Hua Liao、Dun-Ru Zhu、Ya-Fei Ji
DOI:10.1002/jhet.2354
日期:2016.5
A one‐pot synthesis of highly substituted 1H‐pyrazole‐5‐carboxylates 1 has been developed starting from easily available 4‐aryl‐2,4‐diketoesters 2 and arylhydrazine hydrochlorides 3. More active 2‐carbonyl group of 2 was blocked with methoxyamine hydrochloride to give 2‐methoxy imine intermediates, which were then subjected to condensation cyclization with 3 in situ to provide the desired products
Discovery of biological evaluation of pyrazole/imidazole amides as mGlu5 receptor negative allosteric modulators
作者:Eunhee Chae、Yong-Je Shin、Eun-Ju Ryu、Mi Kyung Ji、Nahm Ryune Cho、Ki-Ho Lee、Hyun Ji Jeong、Soo-Jin Kim、Yeonjung Choi、Kyung Seok Oh、Chun-Eung Park、Young Soo Yoon
DOI:10.1016/j.bmcl.2013.01.116
日期:2013.4
Development of SAR in a 5-aryl-3-acylpyridinyl-pyrazoles and 1-aryl-4-acylpyridinyl imidazoles series of mGlu5 receptor negative allosteric modulators (mGluR5 NAMs) using a functional cell-based assay is described in this Letter. Analysis of the Ligand-lipophilic efficiency (LipE) of compounds provided new insight for the design of potent mGluR5 negative allosteric modulators with anti-depressant activities. (C) 2013 Elsevier Ltd. All rights reserved.