Synthesis of thiophenes in a deep eutectic solvent: heterocyclodehydration and iodocyclization of 1-mercapto-3-yn-2-ols in a choline chloride/glycerol medium
摘要:
The heterocyclodehydration and iodocyclization of readily available 1-mercapto-3-yn-2-ols has been performed in a deep eutectic solvent (DES), that is, ChCl/Gly (1:2 molar ratio; ChCl=choline chloride, Gly=glycerol), as a non-conventional green solvent. The processes, carried out at 50 degrees C for 8 h in the presence of the PdI2/KI catalytic system or at room temperature for 5 h with 1.2 equiv of I-2, led to the formation of the corresponding thiophenes and 3-iodothiophenes in good to high yields. The DES/catalytic system could be easily recycled several times without appreciable loss of activity, after extraction of the thiophene product with hexane or Et2O. The alkynylation reaction of alpha-mercapto ketones, necessary for the preparation of the allcynylthiol substrates, was also successfully accomplished in the above protic eutectic mixture competitively with protonolysis. (C) 2016 Elsevier Ltd. All rights reserved.
DOI:
10.1016/j.tet.2016.05.062
作为试剂:
描述:
2,3-二甲基噻吩 、 、 溴甲苯 在
5-苄基-2,3-二甲基噻吩 、 EtOAc pet ether 作用下,
以
四氢呋喃 为溶剂,
以gave 6.96 g (77%) of the title compound as an oil的产率得到5-苄基-2,3-二甲基噻吩
参考文献:
名称:
Furans, benzofurans, and thiophenes useful in the treatment of insulin
This invention provides compounds of Formula I having the structure wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, W, R.sup.9, X, R.sup.6, p, Y, Z, R.sup.7, and R.sub.8 are as defined in the specification, or a pharmaceutically acceptable salt thereof, which are useful in treating metabolic disorders related to insulin resistance or hyperglycemia.
[EN] PROCESS FOR PREPARING 2,5-DISUBSTITUTED 3-ALKYLTHIOPHENES<br/>[FR] PROCEDE D'ELABORATION DE 3-ALKYLTHIOPHENES A DISUBSTITUTION EN 2,5
申请人:CLARIANT LSM ITALIA SPA
公开号:WO2004035562A1
公开(公告)日:2004-04-29
The present invention relates to a process for preparing 2,5-disubstituted 3-alkyl-thiophenes and more particularly to a process for preparing them that comprises an acylation reaction in position 5 of 2-substituted 3-alkylthiophenes. This process does not need reagents which are difficult to handle and does not need anhydrous conditions or inert atmosphere. The resulting product is obtained in high purity.
PTPase inhibitors for improving cardiovascular risk profile
申请人:Wyeth
公开号:US20030022896A1
公开(公告)日:2003-01-30
This invention provides methods of using Protein-tyrosine phosphatase (PTPase) inhibitors for lowering the cardiovascular risk profile in mammals experiencing or subject to type II diabetes or Syndrome X, including lowering levels of blood lipoproteins, free fatty acids and triglycerides, as well as treating, preventing or inhibiting atherosclerosis and other cardiovascular and cerebebrovascular disorders.
Combination of a PTPase inhibitor and a thiazolidinedione agent
申请人:Wyeth
公开号:US20020198203A1
公开(公告)日:2002-12-26
This invention provides methods of using a pharmacological combination of one or more PTPase inhibiting agents and one or more thiazolidinedione agents, including pioglitizone or rosiglitazone, for treatment in a mammal of Syndrome X or type II diabetes or metabolic disorders mediated by insulin resistance or hyperglycemia. Further included in this invention is a method of modulating blood glucose levels in a mammal utilizing the combination of one or more PTPase inhibiting agents and one or more thiazolidinedione agents.
Combination of a PTPase inhibitor and a sulfonylurea agent
申请人:Wyeth
公开号:US20030008869A1
公开(公告)日:2003-01-09
This invention provides pharmaceutical compositions and methods of treatment and control of Syndrome X or type II diabetes in a mammal utilizing a combination of a sulfonylurea agent and a protein-tyrosine phosphatase (PTPase) inhibitors.