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Best Synthetic Methods: C-C Bond Formation

Chemexpress April 29, 2024 0 Comments

Most methods for C-C bond formation involve the coupling of two already-functionalized carbons. Michael P. Doyle of the University of Maryland has developed (J. Am. Chem. Soc. (S)-2-Azido-3,3-dimethylbutanoic acid web…

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Enantioselective Construction of Alkylated Stereogenic Centers

Chemexpress April 29, 2024 0 Comments

One of the simplest ways to establish an enantiomerically-pure ternary center is to selectively hydrogenate a trisubstituted alkene. While there are many examples of the enantioselective reduction of more highly…

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Selective C-H Functionalization

Chemexpress April 29, 2024 0 Comments

Direct conversion of an unactivated C-H bond to a C-O, C-N or C-C bond is a powerful way to add valuable complexity to a substrate. While this is by no…

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Pushing the Limits of Alkene Metathesis in Natural Product Synthesis

Chemexpress April 29, 2024 0 Comments

While alkene metathesis has become part of the toolkit of organic synthesis, investigators around the world are pushing the limits of the method as they employ the reaction in total…

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Transition Metal-Mediated Synthesis of Carbocycles: The Snapper Synthesis of Pleocarpenone

Chemexpress April 29, 2024 0 Comments

Several creative new approaches to carbocyclic ring construction using transition metals have recently been reported. Dichlorocyclopropanes such as 1 are easily prepared by the addition of dichlorocarbene to the corresponding…

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Suzuki Cross Couplings for Oligothiophene Synthesis

Chemexpress April 29, 2024 0 Comments

A recent publication by G. Barbarella and co-workers from Bologna, Italy (J. Org. Chem. 2004, 69, 4821.DOI: 10.1021/jo035723q)reports the rapid preparation of poorly soluble unsubstituted and modified α-quinque and sexithiophenes…

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Enantioselective Construction of Alcohols and Amines

Chemexpress April 29, 2024 0 Comments

Thomas Lectka of Johns Hopkins University has reported (J. PMID:24487575 Am. Chem. Soc. 2006, 128, 1810. DOI: 10.1021/ja058077g)an elegant method for the enantioselectiveα-hydroxylation of carboxylic acids. Chiral amine catalyzed condensation…

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Ontaining 1 m: of 25 mM HEPES (pH 7.five), 0.three M sucrose, 10 mM CaCl2, 10 mM

Chemexpress April 28, 2024 0 Comments

Ontaining 1 m: of 25 mM HEPES (pH 7.five), 0.three M sucrose, 10 mM CaCl2, ten mM MgCl2. Fresh Arabidopsis rosette leaves had been harvested from 4-week-old plants grown in…

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N open access post below the CC BY-NC-ND license (http://creativecommons.

Chemexpress April 28, 2024 0 Comments

N open access short article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). www.molecularmetabolism.comThese outcomes confirmed that NNT is essential for the effects of glucose and FCCP on islet NADPH. On the…

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Quinoxaline Synthesis via an Ugi-Smiles Sequence

Chemexpress April 28, 2024 0 Comments

The groups of Laurent El Kaïm and Laurence Grimaud from Ecole Nationale Supérieure de Techniques Avancées in Paris have reported on the generation of quinoxaline scaffolds (Heterocycles 2007, 73, ASAP.…

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D by scaling is closer to the observed rate at 10 C

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C experiments to mimic diagenesis at burial temperature. The outcomes highlighted

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Hed an in vitro assay in which intestinal epithelial cells were

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48 decrease than those perfused with BAY 412272 alone (11.15 0.91 vs. 17.76 1.87 fmol/mg tissue

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