Biomimetic Synthesis of Polycyclic Polyprenylated Acylphloroglucinol Natural Products Isolated from Hypericum papuanum
摘要:
Biomimetic syntheses of three polycylic polyprenylated acylphloroglucinol natural products isolated from Hypericum papuanum, ialibinone A, ialibinone B, and hyperguinone B, have been accomplished by selective oxidative cyclizations of the proposed biosynthetic precursor 5, which was synthesized from phloroglucinol in three steps.
Expedient synthesis of ialibinones A and B by manganese(III)-mediated oxidative free radical cyclisation
作者:Nigel S. Simpkins、Michael D. Weller
DOI:10.1016/j.tetlet.2010.07.025
日期:2010.9
sequence involved (i) acylation of phloroglucinol under Friedel–Crafts conditions, (ii) double prenylation using phase-transfer methodology, (iii) dearomatising methylation, and (iv) oxidative freeradicalcyclisation using manganese(III) acetate.
Biomimetic Synthesis of Polycyclic Polyprenylated Acylphloroglucinol Natural Products Isolated from <i>Hypericum papuanum</i>
作者:Jonathan H. George、Micha D. Hesse、Jack E. Baldwin、Robert M. Adlington
DOI:10.1021/ol101380a
日期:2010.8.6
Biomimetic syntheses of three polycylic polyprenylated acylphloroglucinol natural products isolated from Hypericum papuanum, ialibinone A, ialibinone B, and hyperguinone B, have been accomplished by selective oxidative cyclizations of the proposed biosynthetic precursor 5, which was synthesized from phloroglucinol in three steps.