A novel approach toward the synthesis of strigolactones through intramolecular [2+2] cycloaddition of ketenes and ketene-iminiums to olefins. Application to the asymmetric synthesis of GR-24
作者:Mathilde Lachia、Pierre M.J. Jung、Alain De Mesmaeker
DOI:10.1016/j.tetlet.2012.06.013
日期:2012.8
ketene-iminium was developed for the preparation of GR-24, a synthetic analogue of the family of strigolactone plant hormones. Excellent levels of regioselectivity and of chiral induction were obtained using a bulky chiral amine for the formation of the cyclobutanone and a subsequent regioselective Baeyer–Villiger afforded the tricyclic lactone core of (+)-GR-24.
烯酮和烯酮-亚胺的分子内[2 + 2]环加成反应被开发用于制备GR-24,这是一种strigolactone植物激素家族的合成类似物。使用庞大的手性胺形成环丁酮可获得极佳的区域选择性和手性诱导水平,随后的区域选择性Baeyer-Villiger提供了(+)-GR-24的三环内酯核心。