Squaric Acid-Based Peptidic Inhibitors of Matrix Metalloprotease-1
摘要:
A series of squaric acid-peptide conjugates were synthesized and evaluated as inhibitors of MMP-1. The cyclobut-3-enedione core was substituted at the 3-position with several functional groups, such as -N(alkyl)OH, -NHOH, and -OH, that are designed to bind to the zinc atom in the active site of the metalloprotease. The 4-position of the cyclobut-3-enedione was derivatized with mono- or dipeptides that are designed to bind in the S1' and S2' subsites of the enzyme, and position the metal chelating group appropriately in the active site for binding to zinc. Positional scanning revealed that -N(Me)OH provided the highest level of inhibition among the chelating groups that were tested, and Leu-Tle-NHMe was the preferred amino acid sequence. A combination of these groups yielded an inhibitor with an IC50 value of 95 mu M. For one inhibitor, conversion of one of the carbonyl groups on the cyclobut-3-enedione core to a thiocarbonyl group resulted in a 18-fold increase in potency, and yielded a compound with an IC50 value of 15 mu M.
Divergent 2‐Chloroquinazolin‐4(3
<i>H</i>
)‐one Rearrangement: Twisted‐Cyclic Guanidine Formation or Ring‐Fused
<i>N</i>
‐Acylguanidines via a Domino Process
作者:Gang Yan、Bereket L. Zekarias、Xiaoyu Li、Victor A. Jaffett、Ilia A. Guzei、Jennifer E. Golden
DOI:10.1002/chem.201905219
日期:2020.2.21
rearrangement/intramolecular cyclization, gated through (E)‐twisted‐cyclic guanidines, to afford ring‐fused N‐acylguanidines. This scalable, structurally tolerant transformation generated 55 guanidines and delivered twisted‐cyclic guanidines with robust plasma stability and an abbreviated total synthesis of an antitumor ring‐fused guanidine (4 steps, 55 % yield).
开发了一种高效的 2-氯喹唑啉-4(3 H )-酮重排,可预测地在一次操作中产生扭曲的环状或稠合的胍,这取决于伴随的二胺试剂中伯胺与仲胺的存在。2-氯喹唑啉酮与仲二胺的配对导致扭曲环状胍的独特形成。使用含伯胺的二胺允许多米诺喹唑啉酮重排/分子内环化,通过 ( E )-扭曲的环状胍进行门控,得到环稠合的N‐酰基胍。这种可扩展的、结构耐受的转化产生了 55 种胍,并提供了具有强大血浆稳定性的扭曲环状胍和一种抗肿瘤环稠合胍的简化全合成(4 步,55% 收率)。
Amino acid derivatives as calcium channel blockers
申请人:Galemmo, JR. Robert
公开号:US20090012010A1
公开(公告)日:2009-01-08
Methods and compounds effective in ameliorating conditions characterized by unwanted calcium channel activity, particularly unwanted N-type and/or T-type calcium channel activity are disclosed. Specifically, a series of compounds containing both an amino acid functionality and multiple aromatic rings are disclosed of the general formula (1) where X is benzhydryl, or an aromatic or heteroaromatic ring.
This invention relates to: (a) compounds of formula I and salts thereof that, inter alia, are useful as hepatitis C virus (HCV) inhibitors; (b) intermediates useful for the preparation of such compounds and salts; (c) pharmaceutical compositions comprising such compounds and salts; and (d) methods of use of such compounds, salts, and compositions.
This invention relates to: (a) compounds of formula I and salts thereof that, inter alia, are useful as hepatitis C virus (HCV) inhibitors; (b) intermediates useful for the preparation of such compounds and salts; (c) pharmaceutical compositions comprising such compounds and salts; and (d) methods of use of such compounds, salts, and compositions.
Asymmetric Synthesis of 4,4-Disubstituted-2-Imidazoli-dinones: Potent NK<sub>1</sub> Antagonists
作者:Gregory A. Reichard、Carmine Stengone、Sunil Paliwal、Ingrid Mergelsberg、Sapna Majmundar、Cheng Wang、Robert Tiberi、Andrew T. McPhail、John J. Piwinski、Neng-Yang Shih
DOI:10.1021/ol030104p
日期:2003.11.1
A highly efficient and practical synthesis of 4,4-Disubstituted-2-Imidazolidinones utilizing a "self-reproduction of the center of chirality" strategy is described.