benzothiazole, benzo[b]thiophene, benzo[b]furan, N-Boc-protected indole and pyrrole, and N-phenylpyrazole using an in situ mixture of ZnCl2·TMEDA (0.5 equiv) and lithium 2,2,6,6-tetramethylpiperidide (1.5 equiv) in THF at room temperature is described. The reaction was evidenced by trapping with iodine, regioselectively giving the expected functionalized derivatives in 52−73% yields. A mixture of mono- and disubstituted
苯并恶唑,苯并噻唑,苯并[脱质子b ]噻吩,苯并[ b ]呋喃,Ñ -Boc保护的吲哚和吡咯和Ñ -phenylpyrazole在氯化锌的混合物原位使用2 ·TMEDA(0.5当量)和2,2-锂描述了室温下在THF中的1,6,6-四甲基哌啶(1.5当量)。通过捕获碘,区域选择性地以52-73%的收率选择性地提供了预期的官能化衍生物,证明了该反应。从噻唑开始获得单取代和二取代的衍生物的混合物。2-金属化苯并[ b ]噻吩与苯并[ b ]的交叉偶联反应在钯催化下,用杂芳族氯化物制备呋喃是可行的。考虑到对基本混合物进行的NMR和DFT研究,提出了一种溶液中存在的酰胺化锂和二酰胺化锌协同作用的反应途径。
Selective metallation of thiophene and thiazole rings with magnesium amide base
作者:Manabu Shilai、Yoshinori Kondo、Takao Sakamoto
DOI:10.1039/b007376h
日期:——
Selective hydrogen–metal exchange reaction of thiophene and thiazole proceeded smoothly with magnesium amide base (iPr2NMgCl) under mild conditions.
Design and characterization of a heterocyclic electrophilic fragment library for the discovery of cysteine-targeted covalent inhibitors
作者:A. Keeley、P. Ábrányi-Balogh、G. M. Keserű
DOI:10.1039/c8md00327k
日期:——
A fragment library of electrophilic small heterocycles was characterized through cysteine-reactivity and aqueous stability tests that suggested their potential as covalent warheads.
Novel compounds of the general formula (I), in which the variables are as defined in claim
1
, the use of these compounds as pharmaceutical compositions, pharmaceutical compositions comprising the compounds and methods of treatment employing these compounds and compositions. The present compounds are useful in the treatment and/or prevention of conditions mediated by Peroxisome Proliferator-Activated Receptors (PPAR), in particular the PPARδ subtype, namely, type 1 diabetes, type 2 diabetes, dyslipidaemia, syndrome X (including the metabolic syndrome, i.e. impaired glucose tolerance, insulin resistance, hyper-triglyceridaemia and/or obesity), cardiovascular diseases (including atherosclerosis) and hypercholesterolaemia.