301 results on '"Riche, Claude"'
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2. {3 + 2} Cycloadditions between alpha,beta-unsaturated esters or nitroalkenes and camphor-derived oxazoline N-oxides: experimental and theoretical study
3. An enantioselective access to 1-alkyl-1,2-dihydroisoquinolines and 1-alkyl-, 3-alkyl-, and 1,3-dialkyl-1,2,3,4-tetrahydroisoquinolines
4. Synthesis and photochemical behavior of peptide nucleic acid dimers and analogues containing 4-thiothymine: unprecedented (5-4) photoadduct reversion
5. A novel stereodivergent synthesis of optically pure cis- and trans-3-substituted proline derivatives
6. Stereochemical aspects in the asymmetric Michael addition of chiral imines to substituted electrophilic alkenes
7. Reactivity of N-phenyl-1-aza-2-cyano-1,3-butadienes in the Diels-Alder reaction
8. Synthesis of optically pure 3,4-disubstituted L-glutamates from a novel 2,3-aziridino-gamma-lactone 4-carboxylate derivative
9. Construction of the bicyclic core structure of the enediyne antibiotic esperamicin-A1 in either enantiomeric form from (-)-quinic acid
10. Crystal structure of crotonic acid ester of the highly potent chiral auxiliary trans-2-(1-(2-naphthyl)-1-methylethyl)- cyclohexanol: a direct evidence for the critical participation of intramolecular pi-stacking interaction in a diastereofacial differentiation process
11. N- versus O-alkylation of 2,3'-anhydrothymidine: reaction of the obtained pyrimidium salts with azide ion
12. A revision of the structures of 17-epi-aristoteline and aristolasicone, the first two examples of inverted indole alkaloids
13. Synthesis of (6R,7R,8S,8aR)-6,7,8-trihydroxyperhydro(1,3)thiazolo(3,2-a)pyridine and its 8aS-epimer: novel, biologically active analogs of castanospermine
14. Asymmetric Synthesis of 1,3,4-Trisubstituted and 3,4-Disubstituted 2-Azeti-dinones: Strategy Based on Use of D-Glucosamine as a Chiral Auxiliary in the Staudinger Reaction
15. α-Thiosubstituted chiral imines/secondary enamines: their use in the asymmetric Michael reaction
16. A Formal Synthesis of (+)-Huperzine A
17. Nitroalkenes as electrophiles in the asymmetric Michael reaction involving chiral imines/enamino esters
18. Asymmetric 1,3-dipolar cycloadditions of a chiral non-racemic azomethine imine
19. Diastereoselective alkynylation of chiral non-racemic oxazolidines with mixed organoaluminum compounds
20. A novel asymmetric synthesis of 2,5-dialkylpyrrolidines
21. RNA photolabeling mechanistic studies: x-ray crystal structure of the photoproduct formed between 4-thiothymidine and adenosine upon near UV irradiation
22. ChemInform Abstract: New Skeletal Rearrangements of C and D Rings of a 13-Oxobaccatin III Derivative.
23. ChemInform Abstract: Artemisinin Tricyclic Analogues Bearing a Methyl Group at C-5a: Preparation and Antimalarial Activity.
24. ChemInform Abstract: An Unexpected Synthesis of a Dihydropyrrolo[1,2-c]pyrimidinedione Nucleoside Analogue from 5-Fluorouracil.
25. ChemInform Abstract: A Novel Asymmetric Synthesis of 2,5-Dialkylpyrrolidines.
26. ChemInform Abstract: Diastereoselective Alkynylation of Chiral Non-Racemic Oxazolidines with Mixed Organoaluminum Compounds.
27. ChemInform Abstract: Nitroalkenes as Electrophiles in the Asymmetric Michael Reaction Involving Chiral Imines/Enamino Esters.
28. ChemInform Abstract: Unexpected Rearrangements of Bicyclic Pyrazolines Derived from 6,6-Diphenylpentafulvene.
29. ChemInform Abstract: The Reaction of α- and ω-Methylenelactams with Nitrones. Influence of Electronic and Geometric Factors on the Stereoselectivity of Their 1,3-Dipolar Cycloaddition.
30. ChemInform Abstract: Synthetic Application of Sequential Palladium-Catalyzed Allylic Acetate Alkylation and Michael Addition Carbocyclization: Synthesis of (.+-.)-Dihydroerythramine.
31. ChemInform Abstract: Reactivity of Arylnitrile Oxides and C‐Aroyl‐N‐phenylnitrones with 3‐Methylenedihydro‐(3H)‐furan‐2‐one and Itaconic Anhydride.
32. Reactivity of Arylnitrile Oxides and C-Aroyl-N-phenylnitrones with 3-Methylenedihydro-(3H)-furan-2-one and Itaconic Anhydride
33. Cytotoxic Flavonoids and α-Pyrones from Cryptocarya obovata
34. The [3 + 2] Cycloaddition of Diphenyldiazomethane and Ethyl Diazoacetate with Itaconic Anhydride. A New Access to Spiranic Cyclopropane Derivatives.
35. Spiroheterocycles from reaction of nitrones with methylene-γ-butyrolactones and some of their rearrangements
36. The [3+2] Cycloaddition of Diphenyldiazomethane and Ethyl Diazoacetate with Itaconic Anhydride. A New Access to Spiranic Cyclopropane Derivatives
37. Synthetic Application of Sequential Palladium-Catalyzed Allylic Acetate Alkylation and Michael Addition Carbocyclization: Synthesis of (±)-Dihydroerythramine
38. Racemization processes at a quaternary carbon center in the context of the asymmetric Michael reaction
39. New Rearranged Limonoids from Harrisonia perforata. III
40. ChemInform Abstract: Regioselective Annulation of 1,5-Diketones: Access to Functionalized Hagemann′s Esters.
41. ChemInform Abstract: New Limonoids from Harrisonia perforata (Blanco) Merr.
42. Regioselective Annulation of 1,5-Diketones: Access to Functionalized Hagemann’s Esters
43. ChemInform Abstract: A Formal Synthesis of (+)‐Huperzine A.
44. ChemInform Abstract: Two 5‐Oxa‐2,6‐diazaspiro[3.4]octan‐1‐one Derivatives from the [3 + 2] Cycloaddition of Methylenelactams with Nitrones.
45. ChemInform Abstract: Asymmetric Functionalization of a Chiral Non‐racemic Oxazolidine Ester Enolate. A New Route Towards the Preparation of Quaternary Serine Esters.
46. New limonoids fromHarrisonia perforata(Blanco) Merr.
47. New Rearranged Limonoids from Harrisonia perforata
48. Two 5-oxa-2,6-diazaspiro[3.4]octan-1-one derivatives from the [3+2] cycloaddition of methylenelactams with nitrones
49. Unexpected Rearrangements of Bicyclic Pyrazolines Derived from 6,6-Diphenylpentafulvene
50. (1S,4R,5R,6R)-6-Methoxycarbonyl-4-pivaloyloxy-2-(pivaloyloxymethyl)bicyclo[3.1.0]hex-2-ene-1-carboxylic acid
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