Stereoselective Synthesis of β-Hydroxy- and β-Ethoxy-δ-lactones: Model Structures for Compounds Isolated from <i>Otoba parvifolia</i>

et al. 2005

“…1) were first prepared from isophorone in our laboratory for synthetic studies purposes, 5,6 as shown in Scheme 1.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Long‐range J_CH heteronuclear coupling constants in cyclopentane derivatives

Lacerda

et al. 2005

“…1,2 For the measurements reported in this paper they were prepared as previously described, and then purified (mainly by column chromatography) until clean spectra were obtained. For the assignment of the 1 H and 13 C NMR spectra of 1-8, a combination of two-dimensional J-resolved and HMQC experiments were carried out.…”

Section: Resultsmentioning

confidence: 99%

Detailed assignments of ¹H and ¹³C NMR spectral data of 14 cyclopentane derivatives

Júnior

2003

Self Cite

“…[1,2] However, the determination of the structure and the relative stereochemistry of these compounds is frequently a difficult task, due to the various conformers that these compounds can exhibit.…”

Section: Stereochemistry Of Cyclopentane Derivatives From 23 J Ch Dementioning

confidence: 99%

Stereochemistry of cyclopentane derivatives from ^{2, 3}J_CH dependence on dihedral angle (θ HCCX)

Lacerda

et al. 2008

The (2,3)J(CH) dependence on dihedral angle (theta H--C--C--X) for cyclopentane derivatives was investigated. We observed that the combined use of experimentally obtained (2,3)J(CH) values and the theoretically determined dihedral angles between the corresponding nuclei can be used to infer the relative stereochemistry of the ring substituents in cyclopentane derivatives. There is a good correlation between the magnitude of (3)J(CH) and the dihedral angle between the hydrogen and the coupled carbon (R2 = 0.88).