乙酸酐 、 Chelonin A 在
吡啶 作用下,
反应 17.0h,
以73%的产率得到Chelonin A acetamide
参考文献:
名称:
Aromatic alkaloids from the marine sponge Chelonaplysilla sp
摘要:
Four novel alkaloids derived from tryptophan and tyrosine subunits have been isolated from the marine sponge Chelonaplysilla sp. collected from a marine lake in Palau. The structures of chelonin A (3), chelonin B (4), bromochelonin B (5), and chelonin C (6) were determined by interpretation of spectral data and chemical conversions. Chelonin A (3) and C (6) are the first natural products incorporating a 2,6-disubstituted morpholine ring. Chelonin A (3), chelonin B (4), and bromochelonin B (5) exhibited antimicrobial activity against Bacillus subtilis, while chelonin A (3) showed in vivo antiinflammatory activity.
N-Tosyl-1,2,3-triazoles as Scaffolds for Morpholines: The Total Synthesis of (–)-Chelonin A
作者:Alex C. Bissember、Jason A. Smith、Scott G. Stewart、Nina Gunawan、Michael J. Nutt
DOI:10.1055/a-1982-5433
日期:——
Substituted morpholine derivatives appear frequently in biologically active compounds and thus novel routes towards such structures are of great synthetic interest. Herein, we report the total syntheses of chelonin A, a morpholine-derived marine naturalproduct with reported antibacterial and anti-inflammatory activity. The key step in this process was a rhodium carbenoid 1,3-insertion into a bromohydrin
取代的吗啉衍生物经常出现在生物活性化合物中,因此获得此类结构的新途径具有很大的合成意义。在此,我们报告了海龟素 A 的全合成,海龟素 A 是一种吗啉衍生的海洋天然产物,据报道具有抗菌和抗炎活性。该过程的关键步骤是将铑类胡萝卜素 1,3-插入溴醇 O-H 键,然后环化,生成 2,6-二取代-3,4-二氢-2 H -1,4-恶嗪核。然后将这项工作扩展到使用富含对映体的溴醇,通过 α-溴酮的不对称转移氢化依次制备 (–)-chelonin A 的第一个不对称全合成。
Simple Syntheses of Marine Alkaloid, (±)-Chelonin A, and Its Analogs
The total synthesis of pimprinine, (+/-)-chelonin A and B, and their analogs are achieved based on 1-hydroxyindole chemistry.
Aromatic alkaloids from the marine sponge Chelonaplysilla sp
作者:Steven C. Bobzin、D. John Faulkner
DOI:10.1021/jo00014a015
日期:1991.7
Four novel alkaloids derived from tryptophan and tyrosine subunits have been isolated from the marine sponge Chelonaplysilla sp. collected from a marine lake in Palau. The structures of chelonin A (3), chelonin B (4), bromochelonin B (5), and chelonin C (6) were determined by interpretation of spectral data and chemical conversions. Chelonin A (3) and C (6) are the first natural products incorporating a 2,6-disubstituted morpholine ring. Chelonin A (3), chelonin B (4), and bromochelonin B (5) exhibited antimicrobial activity against Bacillus subtilis, while chelonin A (3) showed in vivo antiinflammatory activity.