作者:Pietro Allevi、Mario Anastasia、Pierangela Ciuffreda、Alberto Fiecchi、Antonio Scala、Steve Bingham、Max Muir、John Tyman
DOI:10.1039/c39910001319
日期:——
The first synthesis of carminic acid (7β-D-glucopyranosyl-1-methyl-3,5,6,8-tetrahydroxy-9,10-anthraquinone-2-carboxylic acid), was accomplished by direct C-glucosylation of ethyl 3,5,8,9,10-pentamethoxy-1-methylanthracene-2-carboxylate, here synthesized, which affords ethyl 7-(2,3,4,6-tetra-O-benzyl-β-D-glucopyranosyl)-3,5,8,9,10-pentamethoxy-1-methylanthracene-2-carboxylate and carminic acid by regeneration of the masked functionalities.
胭脂红酸(7β-D-吡喃葡萄糖基-1-甲基-3,5,6,8-四羟基-9,10-蒽醌-2-羧酸)的首次合成是通过乙基3的直接C-葡萄糖基化完成的,此处合成的5,8,9,10-五甲氧基-1-甲基蒽-2-甲酸酯,其提供乙基7-(2,3,4,6-四-O-苄基-β-D-吡喃葡萄糖基)-3,通过掩蔽官能团的再生得到5,8,9,10-五甲氧基-1-甲基蒽-2-羧酸酯和胭脂红酸。