d-Glucosamine-Derived Synthons for Assembly of l-threo-Sphingoid Bases. Total Synthesis of Rhizochalinin C
摘要:
A five-step transformation of D-glucosamine, commencing with indium-mediated Barbier reaction without isolation of intermediates, into (R,R)-2-aminohex-5-ene-1,3-diol in 45-51% is described. The latter is a useful synthon for assembly of L-threo-sphingoid bases: long-chain aminoalkanols and aminoalkanediols with configurations antipodal to that found in mammalian D-erythro-sphingosine but prevalent among invertebrate-derived sphingolipids. The utility of the method is demonstrated by the first total synthesis of rhizochalinin C, the long-chain, "two-headed" sphingoid base aglycon of the natural product rhizochalin C from the marine sponge Rhizochalina incrustata.
DOI:
10.1021/jo302355t
作为产物:
描述:
rhizochalin C 在
盐酸 作用下,
以
甲醇 为溶剂,
反应 24.0h,
以0.5 mg的产率得到rhizochalinin C
参考文献:
名称:
Rhizochalins C and D from the Sponge Rhizochalina incrustata. A Rare threo-Sphingolipid and a Facile Method for Determination of the Carbonyl Position in α,ω-Bifunctionalized Ketosphingolipids
摘要:
Rhizochalins C and D (1, 2), new representatives of two-headed glycosphingolipids, were isolated from the sponge Rhizochalina incrustata. Rhizochalin D is an unexpected C-29 homologue of the canonical C-28 dimeric sphingolipid structures. Their structures including absolute configurations were established using spectroscopic data, micromolar-scale Baeyer-Villiger oxidation, and LCMS interpretation of the products. Application of the latter method leads to a revision of the structure of oceanapiside and placement of the keto group at C-18 rather than C-11.
Rhizochalins C and D from the Sponge <i>Rhizochalina incrustata.</i> A Rare <i>threo</i>-Sphingolipid and a Facile Method for Determination of the Carbonyl Position in α,ω-Bifunctionalized Ketosphingolipids
作者:Tatyana N. Makarieva、Pavel S. Dmitrenok、Alexander M. Zakharenko、Vladimir A. Denisenko、Alla G. Guzii、Ronghua Li、Colin K. Skepper、Tadeusz F. Molinski、Valentin A. Stonik
DOI:10.1021/np0704811
日期:2007.12.1
Rhizochalins C and D (1, 2), new representatives of two-headed glycosphingolipids, were isolated from the sponge Rhizochalina incrustata. Rhizochalin D is an unexpected C-29 homologue of the canonical C-28 dimeric sphingolipid structures. Their structures including absolute configurations were established using spectroscopic data, micromolar-scale Baeyer-Villiger oxidation, and LCMS interpretation of the products. Application of the latter method leads to a revision of the structure of oceanapiside and placement of the keto group at C-18 rather than C-11.
<scp>d</scp>-Glucosamine-Derived Synthons for Assembly of <scp>l</scp>-<i>threo</i>-Sphingoid Bases. Total Synthesis of Rhizochalinin C
作者:Jaeyoung Ko、Tadeusz F. Molinski
DOI:10.1021/jo302355t
日期:2013.1.18
A five-step transformation of D-glucosamine, commencing with indium-mediated Barbier reaction without isolation of intermediates, into (R,R)-2-aminohex-5-ene-1,3-diol in 45-51% is described. The latter is a useful synthon for assembly of L-threo-sphingoid bases: long-chain aminoalkanols and aminoalkanediols with configurations antipodal to that found in mammalian D-erythro-sphingosine but prevalent among invertebrate-derived sphingolipids. The utility of the method is demonstrated by the first total synthesis of rhizochalinin C, the long-chain, "two-headed" sphingoid base aglycon of the natural product rhizochalin C from the marine sponge Rhizochalina incrustata.