References
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- Ishida , A. , Toki , S. and Takamuku , S. 1985 . J. Chem. Soc. Chem. Commun. , : 1482 J-L. Fourrey, G. Henry, and P. Jouin, Tetrahedron Lett., 1979, 951.
- Seki , K. and Ohkura , K. 1992 . Nucleosides & Nucleotides , 11 : 521
- Kondo , Y. and Witkop , B. 1969 . J. Am. Chem. Soc. , 91 : 5264
- In view of the NMR spectrum (J 5–6 = 5.9 Hz) and the NOE observation (H-5 > H-6 = ArCH upon irradiation at C5-CH3), the configuration about the C5 and C6 presume to be cis.
- The uptake of deuterium into 3a at C-5 (15%) may suggest that a part of 3 resulted from the hydrogen abstraction by the O4-protonated radical (II)
- 1969 . J. Chem. Phys. , 51 : 4881 The pK a value of II in an aqueous solution was given as 7.2; E. Hayon