Analysis of structure–activity relationships for the ‘A-region’ of N-(4-t-butylbenzyl)-N′-[4-(methylsulfonylamino)benzyl]thiourea analogues as TRPV1 antagonists
摘要:
The structure-activity relationships for the 'A-region' of N-(4-t-butylbenzyl)-N '-[4-(methylsulfonylamino)benzyl]thio-urea analogues have been investigated as TRPV1 receptor antagonists. The 2-halogen analogues showed enhanced antagonism compared to the prototype antagonist. (c) 2005 Elsevier Ltd. All rights reserved.
The invention relates to substituted nitrogen containing bicyclic heterocycles of the formula (I)
wherein Z is CH
2
or N—R
4
and X, R
1
, R
2
, R
4
, R
6
, R
7
and n are as defined in the description. Such compounds are suitable for the treatment of a disorder or disease which is mediated by the activity of MDM2 and/or MDM4, or variants thereof.
Nonsolvent Application of Ionic Liquids: Organo-Catalysis by 1-Alkyl-3-methylimidazolium Cation Based Room-Temperature Ionic Liquids for Chemoselective <i>N</i>-<i>tert</i>-Butyloxycarbonylation of Amines and the Influence of the C-2 Hydrogen on Catalytic Efficiency
作者:Anirban Sarkar、Sudipta Raha Roy、Naisargee Parikh、Asit K. Chakraborti
DOI:10.1021/jo201102q
日期:2011.9.2
1-Alkyl-3-methylimidazolium cation based ionicliquids efficiently catalyze N-tert-butyloxycarbonylation of amines with excellent chemoselectivity. The catalytic role of the ionicliquid is envisaged as “electrophilic activation” of di-tert-butyl dicarbonate (Boc2O) through bifurcated hydrogen bond formation with the C-2 hydrogen of the 1-alkyl-3-methylimidazolium cation and has been supported by a
1-烷基-3-甲基咪唑鎓阳离子类离子液体有效地催化ñ -叔胺的-butyloxycarbonylation具有优良的化学选择性。所述离子液体的催化作用是设想为二的“亲电活化”叔丁基酯(BOC 2 O)通过分叉氢键的形成与1-烷基-3-甲基咪唑鎓阳离子的和C-2的氢已由咪唑C-2氢1-丁基-3-甲基咪唑鎓双(三氟甲基磺酰)亚胺([BMIM] [NTF的的低磁场移位支撑2从δ8.39]),以8.66的中的Boc存在2于O 11 H NMR和无C-2氢的1-丁基-2,3-二甲基咪唑鎓离子液体的催化效率急剧降低。与芳族和脂族胺反应所需的不同时间为分子间和分子内竞争期间选择性形成N - t- Boc提供了手段。在伯脂族胺的存在下,已经与仲脂族胺形成了优选的N - t- Boc。比较N - t -Boc与常见底物的催化效率,发现[bmim] [NTf 2 ]优于已报道的路易斯酸催化剂。
Divergent Palladium- and Platinum-Catalyzed Intramolecular Hydroamination/Hydroarylation of <i>O</i>
-Propargyl-2-aminophenols
作者:Michael S. Christodoulou、Sabrina Giofrè、Gianluigi Broggini、Alberto Mazza、Roberto Sala、Egle M. Beccalli
DOI:10.1002/ejoc.201801103
日期:2018.12.2
O‐propargyl‐2‐aminophenols under palladium‐and platinum catalysis is reported, resulting in the intramolecular hydroamination and hydroarylation processes. The C–N and C–C bonds formation afford 1,4‐benzoxazines and benzopyrans. The subsequent functionalization of the benzopyran scaffold provides a new synthesis of the tricyclic pyrano[3,2‐h]quinolines.
据报道,在钯和铂催化下,O-炔丙基-2-氨基苯酚的反应性不同,导致分子内加氢胺化和加氢芳基化过程。C–N和C–C键的形成提供了1,4-苯并恶嗪和苯并吡喃。苯并吡喃骨架的后续功能化提供了三环吡喃并[3,2- [ h ]]喹啉的新合成方法。
Pd-Catalyzed Regioselective Intramolecular Allylic C–H Amination of 1,1-Disubstituted Alkenyl Amines
作者:Young Ho Kim、Dong Bin Kim、Su San Jang、So Won Youn
DOI:10.1021/acs.joc.2c00781
日期:2022.6.3
Pd-Catalyzed intramolecular allylic C–H amination of 1,1-disubstituted alkenyl amines with various allylic tethers (X = O, NMs, CH2) was developed. This process allows for the divergent synthesis of 1,3-X,N-heterocycles through a regioselective allylic C–H cleavage and π-allylpalladium formation. Particularly noteworthy is the use of substrates containing a labile allylic moiety and new simple catalytic