Reduction of 5-deazaisoalloxazinophanes dFl(n) in which N(3) and O(2′α) in the 10-(2-hydroxy)phenyl group were linked by a (CH2)n chain (n= 6,8) resulted in the boat-shaped 1,5-dihydro forms dFlred(n); hydrogen transfer to dFl(n) and from dFlred(n) occurred exclusively at the axial C(5) position.
S. Shinkai, A. Kawase, T. Yamaguchi and O. Manabe, J. Chem. Soc., Chem. Commun., 1988, 457 DOI: 10.1039/C39880000457
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