509142-71-6Relevant academic research and scientific papers
A general and highly selective chelate-controlled intermolecular oxidative heck reaction
Delcamp, Jared H.,Brucks, Alexandria P.,White, M. Christina
supporting information; experimental part, p. 11270 - 11271 (2009/02/05)
A novel chelate-controlled intermolecular oxidative Heck reaction is reported that proceeds with a wide range of nonresonance stabilized α-olefin substrates and organoboron reagents to afford internal olefin products in good yields and outstanding regio- and E:Z stereoselectivities. Pd-H isomerization, common in many Heck reactions, is not observed under these mild, oxidative conditions. This is evidenced by outstanding E:Z selectivities (>20:1 in all cases examined), no erosion in optical purity for proximal stereogenic centers, and a tolerance for unprotected alcohols. Remarkably, a single metal/ligand combination, Pd/bis-sulfoxide complex 1, catalyzes this reaction over a broad range of coupling partners. Given the high selectivities and broad scope, we anticipate this intermolecular Heck reaction will find heightened use in complex molecule synthesis. Copyright
Identification of 4-amino-2-cyclohexylaminoquinazolines as metabolically stable melanin-concentrating hormone receptor 1 antagonists
Kanuma, Kosuke,Omodera, Katsunori,Nishiguchi, Mariko,Funakoshi, Takeo,Chaki, Shigeyuki,Nagase, Yasuko,Iida, Izumi,Yamaguchi, Jun-ichi,Semple, Graeme,Tran, Thuy-Anh,Sekiguchi, Yoshinori
, p. 3307 - 3319 (2007/10/03)
The optimization of the distance between two key pharmacophore features within our first hit compounds 1a and 2a led to the identification of a new class of potent non-peptidic antagonists for the MCH-R1, based around 4-amino-2-cyclohexylaminoquinazolines. In particular, ATC0065 (2c), N2-[cis-4-({2-[4-Bromo-2-(trifluoromethoxy)phenyl]ethyl}amino)cyclohexyl]-N4,N4-dimethylquinazoline-2,4-diamine dihydrochloride, bound with high affinity to the MCH-R1 (IC50 value of 16 nM) and showed good metabolic stability in liver microsomes from human and rat.
