- P4VPy–CuO nanoparticles as a novel and reusable catalyst: application at the protection of alcohols, phenols and amines
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P4VPy–CuO nanoparticles were synthesized using ultrasound irradiations. Relevant properties of the synthesized nanoparticles were investigated by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and Fourier transform infrared spectroscopy. After identification, the prepared reagent was used for the promotion of different types of protection reactions of alcohols, phenols and amines. Easy workup, short reaction times, excellent yields, relatively low cost and reusability of the catalyst are the striking features of the reported methods.
- Shirini, Farhad,Fallah-Shojaei, Abdollah,Abedini, Masoumeh,Samavi, Laleh
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p. 1699 - 1712
(2016/07/27)
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- Enantiodivergent Atroposelective Synthesis of Chiral Biaryls by Asymmetric Transfer Hydrogenation: Chiral Phosphoric Acid Catalyzed Dynamic Kinetic Resolution
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Reported herein is an enantiodivergent synthesis of chiral biaryls by a chiral phosphoric acid catalyzed asymmetric transfer hydrogenation reaction. Upon treatment of biaryl lactols with aromatic amines and a Hantzsch ester in the presence of chiral phosp
- Mori, Keiji,Itakura, Tsubasa,Akiyama, Takahiko
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supporting information
p. 11642 - 11646
(2016/10/24)
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- Rational design of latent fluorophores from water-soluble hydroxyphenyltriazine dyes suitable for lipase sensing
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Derivatives of 2-(2′-hydroxy-5′-dimethylaminobenzyl)-4,6-dimethylamino-1,3,5-triazine were synthesized by an original multistep protocol that afforded, after quaternization of the N,N-dimethylaminobenzyl moiety, water-soluble fluorescent dyes. These fluor
- Jacquemet, Alicia,Rihn, Sandra,Ulrich, Gilles,Renard, Pierre-Yves,Romieu, Anthony,Ziessel, Raymond
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supporting information
p. 1664 - 1669
(2015/05/27)
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- Refrigerator
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The present invention relates to a refrigerator, including: a refrigerating cycle having an evaporator (1a); a space for exchanging heat with the evaporator; a region for exchanging heat between the evaporator and the space; and a storage chamber and a door for defining the space, wherein at least one of the region, the storage chamber and the door has undergone at least one of a Kimchi lactic acid bacteria culture treatment and a Kimchi lactic acid bacteria culture exposure treatment.
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- Rhodium/chiral diene-catalyzed asymmetric 1,4-addition of arylboronic acids to arylmethylene cyanoacetates
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Asymmetric 1,4-addition of arylboronic acids to (£)-methyl 2-cyano-3-arylpropenoates proceeded in the presence of a rhodium catalyst (3 mol %) coordinated with a chiral diene ligand, (R,R)-Ph-bod*, to give high yields of the corresponding methyl 3,3-diaryl-2-cyanopropanoates with high enantioselectivity (up to 99% ee). This catalytic asymmetric transformation was applied to the asymmetric synthesis of (R)-tolterodine. American Chemical Society.
- Soegel, Sebastian,Tokunaga, Norihito,Sasaki, Keigo,Okamoto, Kazuhiro,Hayashi, Tamio
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p. 589 - 592
(2008/04/12)
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- Complexes of phosphine-phenolate ligands with the [Re=O]3+ and [Re(HNNC5H4N)(NNC5H4N)] 2+ cores
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Complexes incorporating the [Re=O]3+ core have been synthesised with ligands containing the new methyl substituted phosphine - Phenolate PO and PO2 donor sets, (2-hydroxy-5-methylphenyl)diphenylphosphine (H(MePO)) and bis(2-hydroxy-5
- Kovacs,Hein,Sattarzadeh,Patrick,Emge,Orvig
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p. 3015 - 3024
(2007/10/03)
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- Ring transformation of glycidic amides with ortho-metalated phenols to enantiopure 3-hydroxychromanones
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A novel access to hitherto unknown enantiopure 2-alkylchroman-4-ones 10 was found by a reaction of ortho-metalated O-MOM-protected phenols with Weinreb amides 8 of enantiopure cis- or trans-glycidic acids. Upon acidic hydrolysis, the resulting o-MOMO-benz
- Woydowski,Ziemer,Liebscher
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p. 3489 - 3491
(2007/10/03)
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- N-(3-pyridylalkyl)sulfonamide compounds which have useful pharmaceutical activity
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Illustrative examples of the N-(3-pyridylalkyl)sulfonamide derivative are represented by the following formulae [II] and [III]: STR1 The derivatives are available for a thromboxane A2 production inhibitor, a thromboxane A2 antagonist, a prostaglandin H2 antagonist, an anti-thrombus agent, a thrombus-preventing agent and an anti-allergy agent.
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- PHOTOLACTONIZATION : A NOVEL SYNTHETIC ENTRY TO MACROLIDES
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o-Quinol acetates, hydroxyalkyalted at C(6), are easily accesible from simple phenols by Wessely acetoxylation (preferentially catalyzed by BF3).On UV irradiation ( in the presence of an appropriate tertiary amine), they are smoothly converted to macrocyclic lactones.Subtle conditions have been elaborated to lead to high overall yields, and the scope of the conversion of phenols to macrolides has been elucidated.
- Quinkert, Gerhard,Billhardt, Uta-Maria,Jakob, Harald,Fischer, Gerd,Glenneberg, Juergen,et al.
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p. 822 - 861
(2007/10/02)
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