Small-Molecule Inhibitors of Protein Geranylgeranyltransferase Type I
摘要:
Small molecules that inhibit the geranylgeranylation of K-Ras4B and RhoA by protein geranylgeranyltransferase type I (GGTase-I) were identified from chemical genetic screens of heterocycles synthesized through phosphine catalysis of allenes. To further improve the efficacy of the GGTase-I inhibitors (GGTIs), 4288 related compounds bearing core dihydropyrrole/pyrrolidine and tetrahydropyridine/piperidine scaffolds were synthesized on SynPhase lanterns in a split-pool manner through phosphine-catalyzed [3 + 2] and [4 + 2] annulations of resin-bound allenoates. Testing of the 4288 analogues resulted in several GGTIs exhibiting submicromolar IC50 values. Because proteins such as Ras and Rho GTPases are implicated in oncogenesis and metastasis, these GGTIs might ultimately lead to the development of novel antitumor therapeutics.
Alkylzinc-Mediated Addition of Alkynes to<i>N</i>-Tosylaldimines: Enantioselective Synthesis of (<i>E</i>)-(2-En-3-ynyl)-amines
作者:Chao Yin、Xiu-Qin Hu、Xin-Ping Hui、Peng-Fei Xu
DOI:10.1002/adsc.200900219
日期:2009.7
An alkylzinc‐mediated simple and efficient procedure for the catalytic enantioselective synthesis of N‐tosyl‐(E)‐(2‐en‐3‐ynyl)‐amines has been developed. The method works well with various N‐tosylaldimines and alkynes.
The present invention provides small molecules for endothelial cell activation and compositions thereof and methods of making and using the same
本发明提供了用于内皮细胞活化的小分子及其组合物,以及制备和使用这些小分子的方法。
Eco-friendly and efficient catalyst-free synthesis of <i>N</i>-sulfonylimines from sulfonamides and aldehydes: crucial role of Al<sub>2</sub>O<sub>3</sub> as a reusable dehydrating agent
A green synthesis of N-sulfonylimines was developed involving the straightforward condensation of sulfonamides with aldehydes under green and catalyst-free conditions, mediated by neutral Al2O3 as an efficient and reusable dehydrating agent.
The present invention provides small molecules for endothelial cell activation and compositions thereof and methods of making and using the same.
本发明提供了用于内皮细胞活化的小分子及其组合物以及制造和使用方法。
A highly diastereoselective synthesis of 3-carbethoxy-2,5-disubstituted-3-pyrrolines by phosphine catalysis
作者:Xue-Feng Zhu、Christopher E. Henry、Ohyun Kwon
DOI:10.1016/j.tet.2005.03.104
日期:2005.6
Tributylphosphine was used as catalyst to facilitate a [3+2] cycloaddition between gamma-substituted allenoates and N-sulfonylimines. The resulting adducts, 3-carbethoxy-2,5-disubstituted-3-pyrrolines were formed in excellent yields with high diastereoselectivity. The reaction went to completion in several hours at room temperature, and the starting materials were easily prepared with one step from commercially available compounds via known procedures. (c) 2005 Elsevier Ltd. All rights reserved.