Synthesis of the Cores of Hypocrellin and Shiraiachrome: Diastereoselective 1,8-Diketone Aldol Cyclization
摘要:
Intramolecular 1,8-diketone aldol reactions Were Studied as a tool for the construction of the seven-membered rings of hypocrellin and shiraiachrome. Conditions were identified to obtain the relative stereochemistries present in the two natural products with excellent diastereoselectivity. In addition, a nine-membered ring congener, which has yet to be observed in nature, formed with high selectivity when a hindered amine was used in conjunction with silazide bases.
Synthesis of the Cores of Hypocrellin and Shiraiachrome: Diastereoselective 1,8-Diketone Aldol Cyclization
作者:Erin M. O’Brien、Jingxian Li、Patrick J. Carroll、Marisa C. Kozlowski
DOI:10.1021/jo9018914
日期:2010.1.1
Intramolecular 1,8-diketone aldol reactions Were Studied as a tool for the construction of the seven-membered rings of hypocrellin and shiraiachrome. Conditions were identified to obtain the relative stereochemistries present in the two natural products with excellent diastereoselectivity. In addition, a nine-membered ring congener, which has yet to be observed in nature, formed with high selectivity when a hindered amine was used in conjunction with silazide bases.
Carroll, Anthony R.; Read, Roger W.; Taylor, Walter C., Australian Journal of Chemistry, 1994, vol. 47, # 8, p. 1579 - 1590
作者:Carroll, Anthony R.、Read, Roger W.、Taylor, Walter C.