The Spirastrellolides: Construction of the Southern C(1)−C(25) Fragment Exploiting Anion Relay Chemistry
摘要:
Effective construction of the southern C(1)-C(25) fragment of spirastrellolide A has been achieved. Central to this venture was the use of four dithiane unions, including the highly effective deployment of the anion relay chemistry (ARC) tactic recently introduced by our laboratory.
The Spirastrellolides: Construction of the Southern C(1)−C(25) Fragment Exploiting Anion Relay Chemistry
摘要:
Effective construction of the southern C(1)-C(25) fragment of spirastrellolide A has been achieved. Central to this venture was the use of four dithiane unions, including the highly effective deployment of the anion relay chemistry (ARC) tactic recently introduced by our laboratory.
Anion Relay Chemistry Extended. Synthesis of a Gorgonian Sesquiterpene
作者:Amos B. Smith、Dae-Shik Kim、Ming Xian
DOI:10.1021/ol071281j
日期:2007.8.1
Extension of anionrelaychemistry (ARC) beyond the area of dithianes has been achieved by the design of two effectiveARClinchpins capable of three- and four-component couplings. To showcase the ARC tactic in natural product synthesis, a cytotoxic gorgonian linear sesquiterpene was constructed, and the absolute configuration assigned via the Kakisawa/Mosher method. The synthesis proceeded in five
Spirastrellolide studies. Synthesis of the C(1)–C(25) southern hemispheres of spirastrellolides A and B, exploiting anion relay chemistry
作者:Amos B. Smith、Helmars Smits、Dae-Shik Kim
DOI:10.1016/j.tet.2010.01.082
日期:2010.8
Construction of the C(1)–C(25) southern fragments of both spirastrellolide A and B are described. Highlights of the syntheses include effective use of the three component anion relay chemistry (ARC) tactic recently introduced by our laboratory, a stereoselective spirocyclization via concomitant Ferrier reaction to elaborate the BC spiroketal and use of two dithiane unions to install the A ring as well
描述了螺旋链内酯 A 和 B 的 C(1)–C(25) 南部片段的构建。合成的亮点包括有效使用我们实验室最近引入的三组分阴离子中继化学 (ARC) 策略,通过伴随的费里尔反应进行立体选择性螺环化以详细说明BC螺酮和使用两个二噻烷结合来安装A环以及C(22)–C(25) 片段。合成分别以 33 步和 32 步的最长线性序列进行,分别用于螺内酯 A 和螺内酯 B。