Studies Towards the Synthesis of the β‐D‐Xyl‐(1 → 3)‐L‐ara Disaccharide Moiety of OSW‐1 from Ornithogalum saundersiae
摘要:
The OSW-1 disaccharide having 2-O-p-methoxybenzoyl-beta-D-xylopyranosyl-(1 --> 3)-L-arabinopyranoside structure was obtained as the benzylated 4-O-acetyl derivative 19. Also, the 4,2'-di-O-acetate 18 was synthesized by a short synthetic approach. The arabinose acceptor 15 was obtained in a three step-one pot sequence from easily available benzyl beta-L-arabinopyranoside.
Total Synthesis of the Anticancer Natural Product OSW-1
作者:Wensheng Yu、Zhendong Jin
DOI:10.1021/ja012119t
日期:2002.6.1
selenium dioxide-mediated allylic oxidation of 80 and a highly stereoselective 1,4-addition of alpha-alkoxy vinylcuprates 68 to steroid 17(20)-en-16-one 12E to introduce the steroid side chain. This total synthesis demonstrated once again the versatile syntheticapplications of alpha-halo vinyl ether chemistry developed in our laboratories.
A New Strategy for the Stereoselective Introduction of Steroid Side Chain via α-Alkoxy Vinyl Cuprates: Total Synthesis of a Highly Potent Antitumor Natural Product OSW-1<sup>1</sup>
作者:Wensheng Yu、Zhendong Jin
DOI:10.1021/ja004098t
日期:2001.4.1
Synthesis, conformational analysis and SAR research of OSW-1 analogues
作者:Chao Liu、A-peng Wang、Longlong Jin、Yanshen Guo、Yan Li、Zhehui Zhao、Pingsheng Lei
DOI:10.1016/j.tet.2016.05.049
日期:2016.7
1→4)-2-O-acetyl-α-l-arabinopyranosyl)] with three different steroidal sapogenins at 16β-hydroxy. Their conformation was analyzed with NMR spectroscopy and molecule simulation. The arabinose moiety of 1–3 linked analogues was in chair conformation and 1–4 linked analogues was in boat conformation. 1–3 linked analogues exhibited potent anti-proliferation activity against a panel of human tumor cells
通过偶联二糖(2 - O -4-甲氧基苯甲酰基-β - d-吡喃并吡喃糖基- (1→3)-2 - O-乙酰基-α - 1-阿拉伯吡喃糖基)或(2- O -4-(E)-肉桂酰基-β- d-吡喃并吡喃糖基- (1→3)-2 - O-乙酰基-α - 1-阿拉伯吡喃糖基)和它们的1→4连接的类似物[(2- O -4-甲氧基苯甲酰基-β- d-吡喃喃糖基- (1→4)-2 - O-乙酰基-α - 1-阿拉伯吡喃糖基)或(2- O -4-(E)-肉桂酰基-β- d-吡喃木糖基- (1→4) -2- O-乙酰基-α- 1-阿拉伯吡喃糖基]],在16β-羟基上具有三种不同的甾体皂苷元。用NMR光谱和分子模拟分析了它们的构象。1–3个连接类似物的阿拉伯糖部分呈椅子构型,而1–4个连接类似物呈船形。1-3个连接的类似物在纳摩尔浓度水平下对一组人类肿瘤细胞表现出有效的抗增殖活性,而1-4个连接的类似物则没有抗肿
Studies Towards the Synthesis of the β‐<scp>D</scp>‐Xyl‐(1 → 3)‐<scp>L</scp>‐ara Disaccharide Moiety of OSW‐1 from <b> <i>Ornithogalum saundersiae</i> </b>
作者:René Suhr、Joachim Thiem
DOI:10.1081/car-200029997
日期:2004.12.27
The OSW-1 disaccharide having 2-O-p-methoxybenzoyl-beta-D-xylopyranosyl-(1 --> 3)-L-arabinopyranoside structure was obtained as the benzylated 4-O-acetyl derivative 19. Also, the 4,2'-di-O-acetate 18 was synthesized by a short synthetic approach. The arabinose acceptor 15 was obtained in a three step-one pot sequence from easily available benzyl beta-L-arabinopyranoside.