- Formal Aza-Wacker Cyclization by Tandem Electrochemical Oxidation and Copper Catalysis
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In oxidative electrochemical organic synthesis, radical intermediates are often oxidized to cations on the way to final product formation. Herein, we describe an approach to transform electrochemically generated organic radical intermediates into neutral
- Yi, Xiangli,Hu, Xile
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supporting information
p. 4700 - 4704
(2019/03/07)
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- Discovery of 4-[4-({(3R)-1-butyl-3-[(R)-cyclohexyl(hydroxy)methyl]-2,5- dioxo-1,4,9-triazaspiro[5.5]undec-9-yl}methyl)phenoxy]benzoic acid hydrochloride: A highly potent orally available CCR5 selective antagonist
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Based on the original spirodiketopiperazine design framework, further optimization of an orally available CCR5 antagonist was undertaken. Structural hybridization of the hydroxylated analog 4 derived from one of the oxidative metabolites and the new orally available non-hydroxylated benzoic acid analog 5 resulted in another potent orally available CCR5 antagonist 6a as a clinical candidate. Full details of a structure-activity relationship (SAR) study and ADME properties are presented.
- Nishizawa, Rena,Nishiyama, Toshihiko,Hisaichi, Katsuya,Minamoto, Chiaki,Murota, Masayuki,Takaoka, Yoshikazu,Nakai, Hisao,Tada, Hideaki,Sagawa, Kenji,Shibayama, Shiro,Fukushima, Daikichi,Maeda, Kenji,Mitsuya, Hiroaki
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experimental part
p. 4028 - 4042
(2011/08/21)
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- Acylaminothiazole derivatives, preparation and therapeutic use thereof
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This invention discloses and claims a compound conforming to the general formula (I): Wherein R1, R2, R′2, R3, R4 and R5 are as described herein. The compounds of the present invention exhibit an inhibitory effect on the production of β-amyloid peptide (β-A4) by inhibition of gamma protease. Therefore, the compounds of the present invention are useful in the treatment of pathologies such as senile dementia, Alzheimer's disease, Down's syndrome, Parkinson's disease, amyloid angiopathy and/or cerebrovascular disorders.
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Page/Page column 6
(2008/06/13)
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- A study on the Z-selective Horner-Wadsworth-Emmons (HWE) reaction of methyl diarylphosphonoacetates
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Experimental and theoretical studies were conducted to explore the Z-selectivities in the Horner-Wadsworth-Emmons (HWE) reaction employing several methyl diarylphosphonoacetates (3, 4, 5 and 6) and aldehydes. The Z-selectivity depended upon the reaction conditions such as the bases, reaction temperature, and the aromatic substituents on the phosphorus atoms but the almost phosphonoacetates used in the present study showed Z-selectivity in the reactions with both aromatic and aliphatic aldehydes. While the phosphonoacetate (3) with bis(2,4-difluorophenyl)phosphono group showed the highest Z-selectivity in all reaction conditions employed, decrease of the selectivity was observed in the case of some phosphonoacetates with diarylphosphono groups. These experimental results and the theoretical studies calculated by AM1 or 3-21G* ab initio methods suggested that the steric effect in the transition states of the addition steps was important rather than the electronic effect. A different aspect of the reaction courses between the Wittig and HWE reactions in the present computational chemistry was also described.
- Kokin, Keisuke,Iitake, Ken-Ichro,Takaguchi, Yutaka,Aoyama, Hiromu,Hayashi, Sadao,Motoyoshiya, Jiro
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