Synthesis of Piperidine Derivatives by Rhodium- Catalyzed Tandem Reaction of<i>N</i>-Sulfonyl-1,2,3-Triazole and Vinyl Ether
作者:Sisi Yu、Yuehui An、Wenlin Wang、Ze-Feng Xu、Chuan-Ying Li
DOI:10.1002/adsc.201800191
日期:2018.6.5
A chemoselective tandemreaction of 4‐acyloxymethylene‐1‐sulfonyl‐1,2,3‐triazole and vinyl ether was reported, producing polysubstituted piperidinederivatives in up to 96% yield. The key intermediate N‐sulfonyl 1‐azadiene generated by migration of the OAc group to the α‐imino rhodium carbene was isolated and a plausible mechanism was proposed. Several related ring systems were constructed from the
Synthesis of Pyrido[2,3‐
<i>b</i>
]indole Derivatives via Rhodium‐Catalyzed Cyclization of Indoles and 1‐Sulfonyl‐1,2,3‐triazoles
作者:Shengguo Duan、Yuehui An、Bing Xue、Yidian Chen、Wan Zhang、Ze‐Feng Xu、Chuan‐Ying Li
DOI:10.1002/adsc.201901599
日期:2020.4.27
Acyloxy‐substituted α,β‐unsaturated imines generated in situ from triazoles can act as aza‐[4 C] synthons and be trapped by indoles in a stepwise [4 + 2] cycloaddition reaction, thus providing rapid access to valuable pyrido[2,3‐b]indoles in high yields. Attractive features of this reaction system include operational simplicity, readily available substrates, construction of sterically demanding quaternary
由三唑原位生成的酰氧基取代的α,β-不饱和亚胺可以作为aza- [4 C]合成子,并被吲哚在逐步[4 + 2]环加成反应中捕获,从而提供了快速获取有价值的吡啶基[2, 3‐ b ]吲哚高产。该反应系统的吸引人的特征包括操作简便,易于获得的底物,空间要求严格的四元中心的构建以及使用三氟甲磺酸酯的便捷衍生作用。
Use of functionalized onium salts as a soluble support for organic synthesis
申请人:Vaultier Michel
公开号:US20070043234A1
公开(公告)日:2007-02-22
The invention relates to the use of a onium salt functionalized by at least one organic function, as a soluble support, in the presence of at least one organic solvent, for organic synthesis of a molecule, in a homogenous phase, by at least one transformation of said organic function. The onium salt enables the synthesized molecule to be released. The onium salt is present in liquid or solid form at room temperature and corresponds to formula A
1
+
, X
1
−
, wherein A
1
+
represents a cation and X
1
−
represents an anion.
Polyurethane (PU)-derived photoactive and copper-free clickable surface based on perfluorophenyl azide (PFPA) chemistry
作者:Lingdong Li、Jiang Li、Abhilash Kulkarni、Song Liu
DOI:10.1039/c2tb00248e
日期:——
The anchoring and capturing roles of perfluorophenyl azide (PFPA) were combined to produce a universal polyurethane (PU)-derived photoactive surface platform (PU-1-PFPA). The resultant platform was confirmed by contact angle, attenuated total reflectance Fourier transform infrared (ATR FT-IR) spectroscopy, atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) analyses. Upon UV light activation, native heparin was coupled directly onto PU-1-PFPA to yield a substrate with antithrombogenic properties. The same level of antithrombogenic activity was achieved when the recovered heparin was photo-coupled onto PU-1-PFPA. In addition, at room temperature and in the absence of copper catalysts, PU-1-PFPA achieved oriented immobilization of functional moieties bearing an alkynyl functional group.
将全氟苯基叠氮化物(PFPA)的锚定和捕捉作用结合起来,产生了一种通用的聚氨酯(PU)衍生光活性表面平台(PU-1-PFPA)。通过接触角、衰减全反射傅立叶变换红外光谱(ATR FT-IR)、原子力显微镜(AFM)和 X 射线光电子能谱(XPS)分析确认了所得到的平台。紫外光激活后,原生肝素直接耦合到 PU-1-PFPA 上,产生了一种具有抗血栓形成特性的基底。将回收的肝素光耦合到 PU-1-PFPA 上时,也能获得相同水平的抗血栓形成活性。此外,在室温和无铜催化剂的条件下,PU-1-PFPA 还能定向固定带有炔基官能团的功能分子。