95 results on '"Yasumasa Hamada"'
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2. Formal enantioselective synthesis of (−)-allosamizoline using chiral diamine-catalyzed asymmetric aziridination of cyclic enones
3. Formal amide insertion strategy for the synthesis of anatoxin-a using rhodium catalysis
4. Computational studies of the mechanism of Pd-Catalyzed Intramolecular Friedel–Crafts allylic alkylation of phenols
5. Flow Pattern Transition of Fine Cohesive Powders in a Gas-Solid Fluidized Bed under Mechanical Vibrating Conditions
6. Diastereoselective synthesis of quinolizidin-4-one and indolizidin-3-one derivatives with a spirocyclic motif via cascade cyclization using a gold(I)/Brønsted acid relay catalysis
7. Enantioselective synthesis of (R)-Sumanirole using organocatalytic asymmetric aziridination of an α,β-unsaturated aldehyde
8. Synthesis of fused-tricyclic indole derivatives through an acid-promoted skeletal rearrangement
9. Formal meta-specific intramolecular Friedel–Crafts allylic alkylation of phenols through a spirocyclization–dienone–phenol rearrangement cascade
10. Synthesis of 4,5-fused tricyclic quinolines via an acid-promoted intramolecular Friedel–Crafts allenylation of aniline derivatives
11. Enantioselective total syntheses of cedrelin A and methylated paralycolin B using Pd-catalyzed asymmetric intramolecular Friedel–Crafts allylic alkylation of phenols
12. Synthesis of spiro[4.5]cyclohexadienones with an allene motif via a base-promoted intramolecular ipso-Friedel–Crafts addition of phenols to propargyl bromides
13. A novel method for synthesizing 3-arylpyrrolidine and 4-arylpiperidine derivatives through an acid-promoted skeletal rearrangement
14. Enantioselective construction of all-carbon quaternary spirocenters through a Pd-catalyzed asymmetric intramolecular ipso-Friedel–Crafts allylic alkylation of phenols
15. Novel chiral hydrogen bond donor catalysts based on a 4,5-diaminoxanthene scaffold: application to enantioselective conjugate addition of 1,3-dicarbonyl compounds to nitroalkenes
16. Catalytic asymmetric synthesis using P-chiral diaminophosphine oxide preligands: DIAPHOXs
17. Reagent-controlled diastereoselective synthesis of (2S,3R)- and (2R,3R)-2,3-diaminobutanoic acid derivatives using proline-catalyzed α-hydrazination reaction
18. Enantioselective aziridination reaction of α,β-unsaturated aldehydes using an organocatalyst and tert-butyl N-arenesulfonyloxycarbamates
19. Direct anti-selective asymmetric hydrogenation of α-amino-β-keto esters through dynamic kinetic resolution using Ru-axially chiral phosphine catalysts—stereoselective synthesis of anti-β-hydroxy-α-amino acids
20. Enantioselective synthesis of martinelline chiral core and its diastereomer using asymmetric tandem Michael–aldol reaction
21. Pd-catalyzed asymmetric allylic aminations with aromatic amine nucleophiles using chiral diaminophosphine oxides: DIAPHOXs
22. Pd-catalyzed asymmetric allylic alkylation of 2-substituted cycloalkenyl carbonates using a chiral diaminophosphine oxide: (S,RP)-Ph-DIAPHOX
23. Synthesis of novel P-stereogenic phenylphosphonamides and their application to Lewis base-catalyzed asymmetric allylation of benzaldehyde
24. Synthesis of 2,6-dimethyl-9-aryl-9-phosphabicyclo[3.3.1]nonanes: their application to asymmetric synthesis of chiral tetrahydroquinolines and relatives
25. Ir-catalyzed asymmetric allylic amination using chiral diaminophosphine oxides
26. The efficient synthesis of (3R,5R)-5-hydroxypiperazic acid and its diastereomer using Lewis acid-promoted diastereoselective Strecker synthesis
27. Efficient synthesis of 3-substituted 2,3-dihydroquinolin-4-ones using a one-pot sequential multi-catalytic process: Pd-catalyzed allylic amination–thiazolium salt-catalyzed Stetter reaction cascade
28. Total synthesis of halipeptin A, a potent anti-inflammatory cyclodepsipeptide from a marine sponge
29. Practical synthesis of (2S,3R)-3-hydroxy-3-methylproline, a constituent of papuamides, using a diastereoselective tandem Michael-aldol reaction
30. Synthesis of tripeptide hydrolysate from papuamide A: determination of absolute stereostructure of β-methoxytyrosine
31. Remarkable effects of titanium tetrachloride in diastereoselective aza Diels–Alder cycloaddition: synthesis of (S)-piperazic acid
32. Highly efficient synthesis of (R)- and (S)-piperazic acids using proline-catalyzed asymmetric α-hydrazination
33. Synthetic studies on bradykinin antagonist martinellines: construction of a pyrrolo[3,2-c]quinoline skeleton using silicon-tether RCM reaction and allylic amination
34. Stereoselective synthesis of protected (2S,3S)-N-methyl-5-hydroxyisoleucine, a component of halipeptins
35. Synthesis of the acyl side chain segment of polyoxypeptins using regioselective ring-opening of chiral 2,3-epoxy alcohol
36. Stereoselective synthesis of (S)-(+)-lycoperdic acid through an endo selective hydroxylation of the chiral bicyclic lactam enolate with MoOPH
37. Synthetic studies on polyoxypeptins: stereoselective synthesis of (2S,3R)-3-hydroxy-3-methylproline using SmI2-mediated cyclization
38. Efficient enantioselective synthesis of (2R,3R)- and (2S,3S)-3-hydroxyleucines and their diastereomers through dynamic kinetic resolution
39. Stereoselective synthesis of (3S,4R)-3,4-dimethyl-(S)-glutamine and the absolute stereochemistry of the natural product from papuamides and callipeltin
40. Asymmetric allylic substitution reaction with nitrogen and oxygen nucleophiles using monodentate chiral phosphine, 9-PBN
41. Remarkable endo selectivity on hydroxylation of bicyclic lactam enolates with MoOPD and MoOPH
42. The efficient stereoselective synthesis of (2S,3R,4S,5S,6S,11E)-3-amino-6-methyl-12-(4-methoxyphenyl)-2,4,5-trihydroxydodec-11-enoic acid (AMMTD), a component of microsclerodermins of marine sponge origin, as its protected form
43. Novel N → C acyl migration reaction of acyclic imides: A facile method for α-aminoketones and β-aminoalcohols
44. Synthesis and application of new chiral bidentate phosphine, 2,7-di-tert-butyl-9,9-dimethyl-4,5-bis(methylphenylphosphino)xanthene
45. Sunthetic Studies of Microsclerodermins. A Stereoselective Synthesis of a Core Building Block for (2 S,3 R, 4 S,5 S,6 S, 11 E)-3-Amino-6-methyl-12-(4-methoxyphenyl)-2,4,5-trihydroxydodec-11-enoic Acid (AMMTD)
46. New monodentate chiral phosphine 2,6-dimethyl-9-phenyl-9-phosphabicyclo[3.3.1]nonane(9-PBN): Application to asymmetric allylic substitution reaction
47. Synthesis of ethano-Tröger's base, configurationally stable substitute of Tröger's base
48. An efficient synthesis of C20–C25 building blocks for calyculin A
49. A New Asymmetric Synthesis of (S)-Dolaphenine and Its Heteroaromatic Congeners Utilizing (+)-2-Hydroxy-3-pinanone and (−)-3-Hydroxy-2-caranone as Chiral Auxiliaries
50. Total synthesis of phytosiderophores
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