Chemistry Letters, Vol.37, No.2, 198-199, 2008
Total syntheses of doubly locked biliverdin derivatives toward elucidation of the stereochemistry of phytochrome chromophore
To elucidate the stereochemistry of phytochrome chromophore in far-red light absorbing form (Pfr), four different types of doubly locked biliverdin (BV) derivatives, 5Zs15Ea-BV, 5Za15Ea-BV, 5Es15Ea-BV, and 5Ea15Ea-BV, were synthesized for the first time in free acid forms.