在三丁基膦作为催化剂的存在下,由庞大的酸酐将由24元冠醚和在末端带有羟基的仲铵盐组成的拟轮烷定量酰化,从而以高收率得到相应的轮烷。无需色谱分离即可轻松实现大规模合成。在过量的三烷基胺存在下,用过量的亲电子试剂将所得轮烷中的铵基团定量酰化。通过该顺序的双酰化方案制备了各种N-官能化的轮烷。1个轮烷的1 H NMR光谱和X射线晶体学分析表明,冠状醚组分通过强的氢键键合相互作用而被捕获在铵型轮烷中的铵基上。铵基周围的构象通过氢键相互作用而固定。同时,酰胺型轮烷的构象由冠醚中的亚甲基与车轴组件的苯环之间的弱CH /π相互作用确定。铵型轮烷的N-酰化可用于制备功能化的轮烷和弱的基于组分间相互作用的轮烷。
Structure−Activity Relationship Among Purpurinimides and Bacteriopurpurinimides: Trifluoromethyl Substituent Enhanced the Photosensitizing Efficacy
作者:Amy Gryshuk、Yihui Chen、Lalit N. Goswami、Suresh Pandey、Joseph R. Missert、Tymish Ohulchanskyy、William Potter、Paras N. Prasad、Allan Oseroff、Ravindra K. Pandey
DOI:10.1021/jm061036q
日期:2007.4.1
under acidic or basic conditions mainly gave the decomposition products. At similar in vivo treatment conditions (C3H mice with RIF tumors and BALB-C mice with colon-26 tumors) the water-soluble purpurinimide 24 was found to be more effective than the methyl ester analog 8. These results suggest that besides overall lipophilicity the inherent charge of the photosensitizer also influences the PDT efficacy
Chemoproteomics-enabled covalent ligand screen reveals a cysteine hotspot in reticulon 4 that impairs ER morphology and cancer pathogenicity
作者:L. A. Bateman、T. B. Nguyen、A. M. Roberts、D. K. Miyamoto、W.-M. Ku、T. R. Huffman、Y. Petri、M. J. Heslin、C. M. Contreras、C. F. Skibola、J. A. Olzmann、D. K. Nomura
DOI:10.1039/c7cc01480e
日期:——
thus put forth RTN4 as a potential novel colorectal cancer therapeutic target and reveal a unique druggable hotspot within RTN4 that can be targeted by covalent ligands to impair colorectal cancer pathogenicity. Our results underscore the utility of coupling the screening of fragment-based covalent ligands with isoTOP-ABPP platforms for mining the proteome for novel druggable nodes that can be targeted
Disclosed are piperidine derivatives, their manufacture and use as inhibitors of renin.
公开了哌啶衍生物,它们的制造方法及其作为肾素抑制剂的用途。
Inhibitors of c-Jun N-terminal kinases
申请人:Liu Gang
公开号:US20060173050A1
公开(公告)日:2006-08-03
The present invention relates to compounds that are inhibitors of c-jun N-terminal kinase 1, 2, or 3 (JNK1, JNK2, or JNK3), compositions containing the compounds and the use of the compounds in the prevention or treatment of disorders regulated by the activation of JNK1, JNK2 and JNK3.
In the present study, we attempted to develop a novel class of compounds active against Pseudomonasaeruginosa (Pa) by exploring the pharmaceutically well exploited enzyme targets. Since, lack of Pa gyrase B crystal structures, Thermus thermophilus gyrase B in complex with novobiocin (1KIJ) was used as template to generate model structure by performing homology modeling. Further the best model was