[EN] PYRAZOLE DERIVATIVES AS S1P1 AGONISTS<br/>[FR] DÉRIVÉS DU PYRAZOLE EN TANT QU'AGONISTES S1P1
申请人:ALMIRALL SA
公开号:WO2011144338A1
公开(公告)日:2011-11-24
The present invention relates to a compound of formula (I), to the process for preparing such compounds and to their use in the treatment of a pathological condition or disease susceptible to amelioration by sphingosine-1-phosphate receptors (S1P1) agonists.
The present invention relates to a compound of formula (I), to the process for preparing such compounds and to their use in the treatment of a pathological condition or disease susceptible to amelioration by sphingosine-1-phosphate receptors (S1P1) agonists.
‘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’
Development of a Continuous Flow Photoisomerization Reaction Converting Isoxazoles into Diverse Oxazole Products
作者:Cormac Bracken、Marcus Baumann
DOI:10.1021/acs.joc.9b03399
日期:2020.2.21
A continuous flow process is presented, which directly converts isoxazoles into their oxazole counterparts via a photochemical transposition reaction. This results in the first reported exploitation of this transformation to establish its scope and synthetic utility. A series of various di- and trisubstituted oxazole products bearing different appendages including different heterocyclic moieties were
The first synthesis of isoxazolo[3,4-c]pyridine-7-ones
作者:Ervin Csimbók、Daniella Takács、József A. Balog、Orsolya Egyed、Nóra V. May-Nagy、György Miklós Keserű
DOI:10.1016/j.tetlet.2016.08.060
日期:2016.9
lead-oriented synthesis of new heterocycles, ethyl 4-(cyanomethyl)-5-phenylisoxazole-3-carboxylate was identified as a key intermediate towards the synthesis of new isoxazolo[3,4-c]pyridine scaffolds. The key reaction was the catalytic hydrogenation of ethyl 4-(cyanomethyl)-5-phenylisoxazole-3-carboxylate using Raney/Ni followed by a selective ring closure reaction to afford 3-phenylisoxazolo[3,4-c]pyridin-7(6H)-one
在新的杂环的铅导向合成过程中,4-(氰基甲基)-5-苯基异恶唑-3-羧酸乙酯被确定为合成新的异恶唑并[3,4- c ]吡啶骨架的关键中间体。关键反应是使用阮内/镍将4-(氰基甲基)-5-苯基异恶唑-3-羧酸乙酯催化加氢,然后进行选择性闭环反应,得到3-苯基异恶唑并[3,4- c ]吡啶-7(6)H)-one及其不饱和类似物作为具有铅状性质的新环系。