[EN] SUBSTITUTED 3- AND 4- AMINOMETHYLPIPERIDINES FOR USE AS BETA-SECRETASE IN THE TREATMENT OF ALZHEIMER'S DISEASE<br/>[FR] 3- ET 4- AMINOMETHYLPIPERIDINES SUBSTITUEES UTILISEES COMME BETA-SECRETASE DANS LE TRAITEMENT DE LA MALADIE D'ALZHEIMER
申请人:ACTELION PHARMACEUTICALS LTD
公开号:WO2004002483A1
公开(公告)日:2004-01-08
The invention relates to novel compounds, which are substituted chiral or achiral derivatives of 3- or 4- aminomethylpiperidine of the general formula (I). The invention also concerns related aspects including processes for the preparation of the compounds, pharmaceutical compositions containing one or more compounds of general formula (I) and especially their use as inhibitors of beta-secretases for the treatment of Alzheimer’s disease.
An efficient dehydroxymethylation reaction by a palladium catalyst
作者:Atanu Modak、Togati Naveen、Debabrata Maiti
DOI:10.1039/c2cc36951f
日期:——
A general method for selective dehydroxymethylation has been discovered by using widely available Pd(OAc)(2). The present study offers a new synthetic strategy for the regioselective functionalization by employing the steric, electronic and coordinating nature of the hydroxymethyl (-CH(2)OH) group temporarily.
Synthesis of zwitterionic palladium complexes and their application as catalysts in cross-coupling reactions of aryl, heteroaryl and benzyl bromides with organoboron reagents in neat water
作者:V. Ramakrishna、N. Dastagiri Reddy
DOI:10.1039/c7dt01433c
日期:——
found to be highly active for carrying out these reactions between aryl bromides and organoboron reagents. Further, the scope of the catalyst I was also examined by employing (hetero)aryl bromides, hydrophilic aryl bromides, benzylbromides and various organoboron reagents. More than 80 aryl/benzyl bromide-arylboronic acid combinations were screened in neat water/K2CO3 and found that I is a versatile catalyst
N-(3-氯-2-喹喔啉基)-N'-芳基咪唑鎓盐(芳基= 2,6-二异丙基苯基[HL1Cl] Cl,芳基=甲苯基[HL2Cl] Cl)已通过将2,3-二氯喹喔啉与N'-芳基咪唑纯净。这些咪唑鎓盐与Pd(PPh 3)4和Pd 2(dba)3 / PPh 3(dba =二苄基苯丙酮)在50 o C的容易反应,得到两性离子钯(II)络合物[Pd(HL1)(PPh 3) Cl 2 ](I)和[Pd(HL2)(PPh 3)Cl 2 ](II)的收率极高。已测试I和II在纯水/ K中催化Suzuki-Miyaura交叉偶联(SMC)反应的能力2 CO 3,对在芳基溴化物和有机硼试剂之间进行这些反应具有很高的活性。此外,还通过使用(杂)芳基溴化物,亲水性芳基溴化物,苄基溴化物和各种有机硼试剂来检查催化剂I的范围。在纯水/ K 2 CO 3中筛选了80多种芳基/苄基溴-芳基硼酸组合,发现I是一种多用途催化
Palladacycles derived from arylphosphinamides for mild Suzuki–Miyaura cross-couplings
作者:Guo-Jie Wu、Fu-She Han、Yu-Long Zhao
DOI:10.1039/c5ra12742d
日期:——
of palladacycles, a wide variety of aryl bromides and boronicacids could be coupled very efficiently at ambient temperature and under air atmosphere without the need of external supporting ligands. Moreover, the mild conditions also allow for smooth coupling of electron-deficient, i.e., the less stable aryl triflates. In addition to the highly catalytic activity, the palladacyclic complexes can be
Phosphine-free palladium-catalysed direct C2-arylation of benzothiophenes with aryl bromides
作者:Liqin Zhao、Christian Bruneau、Henri Doucet
DOI:10.1016/j.tet.2013.06.037
日期:2013.8
some electron-rich aryl bromides. The presence of a methyl or a formyl substituent at C3 of benzothiophene has a minor influence on the reactivity, and even a bromo substituents at C3 is tolerated. A wide variety of functional groups on the aryl bromide, such as nitrile, nitro, acetyl, formyl, ester, chloro, fluoro or trifluoromethyl has been employed.