Synthetic studies on nogalamycin : stereospecific C-5 alkylations of a sugar derivative via claisen rearrangement and a new route to 1,1,4-trialkoxybuta-1,3-dienes
作者:J.-M. Vatele
DOI:10.1016/s0040-4020(01)87284-7
日期:1986.1
Claisen rearrangement of the 4-methoxybutadienylether of the allylic alcohol 13, which was made in 15 steps from D-glucose, afforded one major aldehyde 17 or 18 in good yield. All attempts to oxidize this aldehyde to an acid were unsuccessful. The model compound 24 and compound 13 were converted respectively to the α ,β -unsaturated esters 25 and 26. Compound 25 was further transformed into the 1,1
由D-葡萄糖以15个步骤制得的烯丙醇13的4-甲氧基丁二烯基醚的克莱森重排以良好的产率提供了一种主要的醛17或18。将这种醛氧化为酸的所有尝试均未成功。将模型化合物24和化合物13分别转化为α,β-不饱和酯25和26。将化合物25进一步转化为1,1,4-三烷氧基丁-1,3-二烯27,发现其对醌没有反应性。