A process is provided for producing anthocyanidins of formula III
wherein m represents an integer from 1 to 3, and X⁻ represents an anion, which involves reducing a protected flavonol of formula
where each R⁴ represents a C₁#SB-#₁₀
hydrocarbyl group and m is 1 to 3 and converting OR⁴ groups to hydroxy groups.
提供了一种制备
花青素III的方法
其中m代表从1到3的整数,X⁻代表一个阴离子,涉及将保护的
黄酮醇还原为
其中每个R⁴代表一个C₁#SB-#₁₀
碳氢化合物基团,m为1至3,并将OR⁴基团转化为羟基。