Long-range I-I Couplingの研究 (第1報)
α, β-不飽和ケトン系のLong-range I-I Coupling その1
1965 年 85 巻 5 号 p. 377-382
詳細
1965 年 85 巻 5 号 p. 377-382
Some discussions were made on the presence of a long-range I-I coupling of C4-H in the NMR spectra of Δ4-3-keto-steroids substituted with chlorine at 6α-, 6β-, 2α-, and/or 2β-positions, and stereochemical significance of the width of their half-values. Comparative examinations were made on the maximum absorptions and absorbance of various derivatives in their ultraviolet spectra. It was suggested from the results of NMR and ultraviolet spectra that the size of the long-range I-I coupling was correlated to the steric state of A and B rings.
