Highly diastereoselective desymmetrisation of cyclic meso-anhydrides and derivatisation for use in natural product synthesis
作者:Amanda C. Evans、Deborah A. Longbottom、Masato Matsuoka、John E. Davies、Richard Turner、Vilius Franckevičius、Steven V. Ley
DOI:10.1039/b813494d
日期:——
A new and efficient desymmetrisation of succinic and glutaric cyclic meso-anhydrides is described, providing excellent yields and diastereoselectivities in most cases. Derivatisation of the desymmetrised products is demonstrated by their conversion into mono-protected 1,4-diols. General synthetic utility of the method is established by its application towards a key fragment in the total synthesis of the immunosuppressant antitumour natural product, rapamycin.
本文描述了琥珀酸和谷氨酸环状内消旋酐的一种新的高效去对称化方法,在大多数情况下提供了优异的产率和非对映选择性。通过将去对称化产物转化为单保护的1,4-二醇,展示了它们的衍生化能力。通过该方法在免疫抑制抗肿瘤天然产物雷帕霉素的全合成中关键片段的应用,证明了其普遍的合成实用性。