A reinvestigation of the reductive Claisen rearrangement of the
bis(allyloxy)anthraquinones (1) and (2) with sodium dithionite of high quality
has afforded new compounds. These include inter alia
diastereomeric pairs of doubly rearranged leuco 1,4-dihydroxyanthraquinones in
the diketo form [(14) and (16); (15) and (17)], products derived
from attack on or rearrangement to a quinone carbonyl group, e.g. (28) and
(29), and in the case of (1) a 10-deoxygenated 1,4-anthraquinone (21).
Structures have been assigned from two-dimensional n.m.r. experiments.
对双(烯丙氧基)蒽醌 (1) 和 (2)
双(烯丙基氧基)蒽醌 (1) 和 (2) 与优质二亚硫酸钠的还原克莱森重排反应进行了再研究,得到了新的化合物。
得到了新的化合物。这些化合物包括
对映体对双重排的 1,4-二羟基亮蒽醌,其形式为
(14)和(16);(15)和(17)
(28)和(29)等醌羰基上的攻击或重排而得到的产物。
(29) 以及 (1) 中的 10-脱氧 1,4-蒽醌 (21)。
结构是通过二维 n.m.r.实验确定的。