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。
Intramolecular [4 + 2] Cycloadditions of Benzynes with Conjugated Enynes, Arenynes, and Dienes
作者:Martin E. Hayes、Hiroshi Shinokubo、Rick L. Danheiser
DOI:10.1021/ol051372l
日期:2005.9.1
Benzynes generated by the reaction of o-(trimethylsilyl)aryl triflates with TBAT participate in intramolecular [4 + 2] cycloadditions with conjugated enynes, arenynes, and dienes to furnish highly condensed polycyclic aromatic compounds. [reaction: see text]
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。
CCR2 INHIBITORS AND METHODS OF USE THEREOF
申请人:Basak Arindrajit
公开号:US20100234364A1
公开(公告)日:2010-09-16
Compounds are provided that act as potent antagonists of the CCR2 or CCR9 receptor. Animal testing demonstrates that these compounds are useful for treating inflammation, a hallmark disease for CCR2 and CCR9. The compounds are generally aryl sulfonamide derivatives and are useful in pharmaceutical compositions, methods for the treatment of CCR2-mediated diseases, CCR9-mediated diseases, as controls in assays for the identification of CCR2 antagonists, and as controls in assays for the identification of CCR9 antagonists.
This communication describes the deproto-metalation of a large range of aromatics including heterocycles using a newly developed lithium–cadmium base; the reaction proceeds at room temperature with an excellent chemoselectivity and efficiency, and proved to be regioselective in most cases.
The Synthesis of Highly Substituted Cyclooctatetraene Scaffolds by Metal-Catalyzed [2+2+2+2] Cycloadditions: Studies on Regioselectivity, Dynamic Properties, and Metal Chelation
作者:Paul A. Wender、Justin P. Christy、Adam B. Lesser、Marc T. Gieseler
DOI:10.1002/anie.200903859
日期:2009.9.28
All‐kynes of COTs: A Ni0‐catalyzed [2+2+2+2] cycloaddition of 1,6‐diynes yields highly functionalized hexa‐ and octa‐substitutedcyclooctatetraenes (COTs; see picture) along with the first example of a fully intramolecular [2+2+2+2] cycloaddition product. The regioselectivity of this process is studied and the initial use of COT ligands is shown in the formation of a ZnII complex with a bis(oxazoline)