Isolation, Structural Elucidation, and Absolute Stereochemistry of Enigmazole A, a Cytotoxic Phosphomacrolide from the Papua New Guinea Marine Sponge <i>Cinachyrella enigmatica</i>
作者:Naoya Oku、Kentaro Takada、Richard W. Fuller、Jennifer A. Wilson、Megan L. Peach、Lewis K. Pannell、James B. McMahon、Kirk R. Gustafson
DOI:10.1021/ja1016766
日期:2010.8.4
Enigmazole A (1), a novel phosphate-containing macrolide, was isolated from a Papua New Guinea collection of the marinesponge Cinachyrella enigmatica. The structure of 1, including the absolute stereochemistry at all eight chiral centers, was determined by a combination of spectroscopic analyses and a series of microscale chemical derivatization studies. Compound 1 is comprised of an 18-membered phosphomacrolide
作者:Yanran Ai、Mariya V. Kozytska、Yike Zou、Anton S. Khartulyari、Amos B. Smith
DOI:10.1021/jacs.5b11540
日期:2015.12.16
A highly convergent, stereocontrolledtotalsynthesis of the architecturally complex marine sponge metabolite (−)-enigmazole A has been achieved. Highlights include an unprecedented late-stage large-fragment Petasis–Ferrier union/rearrangement, a multicomponent Type I Anion Relay Chemistry (ARC) tactic, and a dithiane–epoxide union in conjunction with an oxazole-directed stereoselective reduction.
已经实现了结构复杂的海洋海绵代谢物 (-)-enigmazole A 的高度收敛、立体控制的全合成。亮点包括前所未有的后期大片段 Petasis-Ferrier 结合/重排、多组分 I 型阴离子中继化学 (ARC) 策略,以及二噻烷-环氧化物结合与恶唑定向的立体选择性还原。