Synthesis of the schweinfurthin hexahydroxanthene core through Shi epoxidation
摘要:
Use of a Shi epoxidation for introduction of chirality in a key epoxide intermediate, together with revised protecting group tactics, has allowed an efficient synthesis of the hexahydroxanthene subunit common to the natural schweinfurthin F and the synthetic analogue 3-deoxyschweinfurthin B. (C) 2007 Elsevier Ltd. All rights reserved.
Synthesis of the schweinfurthin hexahydroxanthene core through Shi epoxidation
摘要:
Use of a Shi epoxidation for introduction of chirality in a key epoxide intermediate, together with revised protecting group tactics, has allowed an efficient synthesis of the hexahydroxanthene subunit common to the natural schweinfurthin F and the synthetic analogue 3-deoxyschweinfurthin B. (C) 2007 Elsevier Ltd. All rights reserved.
Synthesis of the cis-fused hexahydroxanthene system via cationic cascade cyclization
作者:Jeffrey D. Neighbors、Joseph J. Topczewski、Dale C. Swenson、David F. Wiemer
DOI:10.1016/j.tetlet.2009.04.052
日期:2009.7
The cis-fused hexahydroxanthene system can be obtained through a cascadecyclization initiated by Lewis acid-mediated epoxide opening and terminated by reaction with a MOM-protected phenol. Only a single diastereomer of the product was obtained with stereochemistry verified by diffraction analysis. This demonstrates the viability of this approach to natural products containing the cis-fused hexahydroxanthene
Synthesis of the schweinfurthin hexahydroxanthene core through Shi epoxidation
作者:Jeffrey D. Neighbors、Nolan R. Mente、Kelly D. Boss、Donald W. Zehnder、David F. Wiemer
DOI:10.1016/j.tetlet.2007.11.086
日期:2008.1
Use of a Shi epoxidation for introduction of chirality in a key epoxide intermediate, together with revised protecting group tactics, has allowed an efficient synthesis of the hexahydroxanthene subunit common to the natural schweinfurthin F and the synthetic analogue 3-deoxyschweinfurthin B. (C) 2007 Elsevier Ltd. All rights reserved.