对不和终端环氧化物进行分子内循环化
David M Hodgson1, Ying Kit Chung, Jean-Marc Paris
1Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford OX1 3TA, UK. david.hodgson@chem.ox.ac.uk
Journal of the American Chemical Society
|July 15, 2004
概括
胺催化剂使同质性环氧化物能够有效地进行分子内循环化. 这种新的方法促进了 sabina ketone 的不对称合成, sabina ketone 是一种有价值的天然产品.
科学领域:
- 有机化学 有机化学
- 合成化学 合成化学
- 催化剂是一种催化剂.
背景情况:
- 内分子循环化是有机合成中的一个关键转化.
- 同质性环氧化物是复杂分子构建的多功能构建模块.
- 开发高效和立体选择性循环化方法仍然是一个重大挑战.
研究的目的:
- 开发一种新的胺诱导的分子内循环化方法.
- 为了证明这种方法在sabina ketone的不对称合成中的应用.
主要方法:
- 用胺基处理双相和三相环氧化物.
- 采用奇拉辅助器或催化剂进行不对称的诱导.
- 循环产品的净化和表征.
主要成果:
- 实现了各种同质性环氧化物高效的分子内环.
- 在循环化反应中证明了高产量和立体选择性.
- 通过使用开发的方法,以enantioselective的方式成功合成sabina ketone.
结论:
- 胺诱导的循环胺为循环胺提供了一条高效和多用途的途径.
- 开发的方法为不对称合成提供了一个强大的工具.
- 这种方法对于合成复杂的天然产品,如沙比纳,是有价值的.
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