Titanocene Catalysed 5-exo Cyclisations of Unsaturated Epoxides- Reagent Control in Radical Chemistry

Titanocene Catalysed 5-exo Cyclisations of Unsaturated Epoxides- Reagent Control in Radical Chemistry
复制标题

二茂钛催化不饱和环氧化物的 5-exo 环化 - 自由基化学中的试剂控制

DOI:
10.1055/s-2001-18713
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发表时间:
2004
期刊:
Synthesis
影响因子:
--
通讯作者:
H. Bluhm
H. Bluhm
中科院分区:
--
文献类型:
--
作者:
A. Gansäuer;Marianna Pierobon;H. Bluhm

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Synthesis 2001,No. 16,30 11 2001.文章标识符:1437- 210 X,E;2001,0,16,2500,2520,ftx,en;T08001SS.pdf。© Georg Thieme Verlag Stuttgart ·纽约ISSN 0039-7881摘要:提出了一种合成含有吡咯烷和四氢呋喃单元以及各种其他四氢呋喃衍生物的碳环和杂环[3. 3. 0]、[4. 3. 0]和[5. 3. 0]系统的方法。这些产品与天然产物合成和生物活性化合物的合成有关。二茂钛催化的反应利用容易获得的不饱和环氧化物作为底物。一个模型解释环化反应的非对映选择性,应允许更有选择性的催化剂的合理设计。
Synthesis 2001, No. 16, 30 11 2001. Article Identifier: 1437-210X,E;2001,0,16,2500,2520,ftx,en;T08001SS.pdf. © Georg Thieme Verlag Stuttgart · New York ISSN 0039-7881 Abstract: A synthetic route to carbocyclic and heterocyclic [3.3.0], [4.3.0] and [5.3.0] systems containing pyrrolidine and tetrahydrofuran units and various other tetrahydrofuran derivatives is presented. The products are of relevance for natural product synthesis and for the synthesis of biologically active compounds. The titanocene catalysed reactions utilises readily available unsaturated epoxides as substrates. A model explaining the diastereoselectivity of cyclisation is presented that should allow for rational design of more selective catalysts.