Isobenzofurans and ortho-benzoquinone monoketals in syntheses of xestoquinone and its 9- and 10-methoxy derivatives
摘要:
Syntheses of (+/-)-xestoquinone, (+/-)-9-methoxyxestoquinone and (+/-)-10-methoxyxestoquinone are described. A convergent CD plus ABE plan using the appropriate isobenzofuran (CD) and naphthofuranone (ABE) has been implemented to provide these marine metabolites in overall yields of 18.3, 9.5 and 8.5%, respectively. The latter pair of compounds, previously evaluated as inhibitors of Topoisomerase II as an inseparable mixture, are now available separate and pure for the first time. (C) 2000 Elsevier Science Ltd. All rights reserved.
Isobenzofurans and ortho-benzoquinone monoketals in syntheses of xestoquinone and its 9- and 10-methoxy derivatives
摘要:
Syntheses of (+/-)-xestoquinone, (+/-)-9-methoxyxestoquinone and (+/-)-10-methoxyxestoquinone are described. A convergent CD plus ABE plan using the appropriate isobenzofuran (CD) and naphthofuranone (ABE) has been implemented to provide these marine metabolites in overall yields of 18.3, 9.5 and 8.5%, respectively. The latter pair of compounds, previously evaluated as inhibitors of Topoisomerase II as an inseparable mixture, are now available separate and pure for the first time. (C) 2000 Elsevier Science Ltd. All rights reserved.
Formal total synthesis of xestoquinone via furan ring transfer reaction strategy
作者:Ken Kanematsu、Seizo Soejima、Guilin Wang
DOI:10.1016/s0040-4039(00)92301-3
日期:1991.1
A formal totalsynthesis of the marine natural product xestoquinone (5) based upon FRT reactionstrategy is accomplished by preparation of the pentacyclic furan 6, an advanced key intermediate in Harada's previous totalsynthesis of this target.
Intramolecular Diels−Alder and Cope Reactions of <i>o</i>-Quinonoid Monoketals and Their Adducts: Efficient Syntheses of (±)-Xestoquinone and Heterocycles Related to Viridin