| 摘要 |
<p>A process is provided for producing delphinidin which comprises reacting a compound of formula <CHEM> wherein each Pg represents a hydroxyl protecting group, and Lg represents a leaving group with a compound of formula <CHEM> wherein Pg min represents a hydroxyl protecting group characterized in that the compound of formula VII is produced from an intermediate of formula <CHEM> wherein each Pg sec represents a hydroxyl protecting group and each Alk represents lower alkyl, by (i) subjecting the intermediate of formula IX to hydrolysis and decarboxylation to form 3,4,5-trihydroxyacetophenone of formula <CHEM> (ii) converting the 3,4,5-trihydroxyacetophenone to the compound of formula VII by introduction of the protecting groups Pg sec and converting the group of formula -COCH3 to a group of formula -COCH2Lg. s</p> |
