Discovery of Potent and Selective SH2 Inhibitors of the Tyrosine Kinase ZAP-70
摘要:
A series of 1,2,4-oxadiazole analogues has been shown to be potent and selective SH2 inhibitors of the tyrosine kinase ZAP-70, a potential therapeutic target for immune suppression. These compounds typically are 200-400-fold more potent than the native, monophosphorylated tetrapeptide sequences. When compared with the high-affinity xi-1-ITAM peptide (Ac-NQL-pYNELNLGRREE-pYDVLD-NH2, wherein pY refers to phosphotyrosine) some of the best 1,2,4-oxadiazole analogues are approximately 1 order of magnitude less active. This series of compounds displays an unprecedented level of selectivity over the closely related tyrosine kinase Syk, as well as other SH2-containing proteins such as Src and Grb2. Gel shift studies using a protein construct consisting only of C-terminal ZAP-70 SH2 demonstrate that these compounds can effectively engage this particular SH2 domain.
scaffolds—ortho‐orientated terphenyls presenting twoatropisomeric Ar–Ar axes. These unusual structures were built up by using the C−Hactivation approach, and remarkably, both chiral axes were controlled with excellent stereoselectivity in a single transformation. During the reaction, not only does atroposelective functionalization of a biaryl precursor occur to establish one stereogenic axis, but an
Electron transfer in bis-porphyrin donor-acceptor compounds with polyphenylene spacers shows a weak distance dependence
作者:Anna Helms、David Heiler、George McLendon
DOI:10.1021/ja00041a047
日期:1992.7
containing one, two, or three phenyl bridges. Complete synthetic details are provided. For studies of photochemicalelectrontransfer, mixed metals were incorporated, with zinc in one porphyrin macrocycle and Fe III (bis-imidazole) in the other macrocycle. When photoexcited, an electron is transferred from Zn to Fe III
已经合成了一系列亚苯基桥连的双卟啉加合物,包含一个、两个或三个苯桥。提供了完整的合成细节。为了研究光化学电子转移,加入了混合金属,锌在一个卟啉大环中,而 Fe III(双咪唑)在另一个大环中。当光激发时,一个电子从 Zn 转移到 Fe III
Vinylsilyl Grignard reagents as aryne traps. A new route to (arylalkenyl)silanes.
作者:Thottumkara K. Vinod、Harold Hart
DOI:10.1016/s0040-4039(00)82473-9
日期:1988.1
A general method for preparing (arylalkenyl)silanes via nucleophilic capture of arynes with vinyltrimethylsilyl Grignardreagents is described.
描述了通过用乙烯基三甲基甲硅烷基格氏试剂亲核捕获芳烃来制备(芳基烯基)硅烷的一般方法。
Aminoborylation/Suzuki–Miyaura tandem cross coupling of aryl iodides as efficient and selective synthesis of unsymmetrical biaryls
Sequential borylation of a first aryl iodide using a dialkylaminoborane followed by a Suzuki-Miyaura cross coupling of second aryl iodide ended up with an efficient, selective and practical synthesis of unsymmetrical biaryls. This tandem coupling shows a wide range of applicability.
The present invention relates to compounds of the formula (I) wherein the variables are defined in the description and claims, their preparation and uses thereof.