作者:Stuart T. Caldwell、Hanna M. Petersson、Louis J. Farrugia、William Mullen、Alan Crozier、Richard C. Hartley
DOI:10.1016/j.tet.2006.05.046
日期:2006.7
13C-labelled at C-2 of the flavonoid unit by synthesis in 15% yield over five steps from [13C]carbon dioxide. The route is appropriate for radiochemical synthesis. Formation of the protected 3-glucosylated flavonol appears to result from [1,7]-sigmatropic rearrangement with migration of a benzyl group followed by cyclisation. A free 5-OH results even when a phosphazene superbase is used.
潜在重要的饮食抗氧化剂槲皮素3 - O -β-d-葡萄糖苷已通过从[ 13 C]二氧化碳经过5步合成,以15%的产率在类黄酮单元的C-2处被13 C标记。该路线适用于放射化学合成。受保护的3-葡萄糖基化黄酮醇的形成似乎是由[1,7]-σ重排导致的,其中苄基迁移,然后环化。即使使用磷腈超强碱,也会产生游离的5-OH。
99. Anthoxanthins. Part XIV. ω-Hydroxyphloracetophenone and certain derivatives. Synthesis of galangin under milder conditions than those used heretofore
作者:J. J. Chavan、Robert Robinson
DOI:10.1039/jr9330000368
日期:——
Minter; Gherghel, Academia Republicii Populare Romine, Baza de Cercetari Stiintifice, Timisoara, Studii si Cercetari, Stiinte Chimice, 1956, vol. 4, p. 111,118