Simple and efficient synthetic routes to d-cycloserine
作者:Hee-Kwon Kim、Kyoung-Joo Jenny Park
DOI:10.1016/j.tetlet.2012.01.089
日期:2012.3
has been successfully synthesized in good yields through three new syntheticroutes from a readily available d-serine. In each synthesis, cyclization served as the key step, and two of the routes employed one-pot operations for the preparation of the target product. These methods featured the use of mild reaction conditions and simple treatments.
An efficient and facile synthesis of D-cycloserine substantially free from potential impurities
作者:Arun Kumar Awasthi、Brijesh Kumar、Mushtaq A Aga、Punit Tripathi、Cirandur Suresh Reddy、Pramod Kumar
DOI:10.1007/s10593-018-2197-y
日期:2017.11
An efficient and facilesynthesis of D-cycloserine has been developed from D-serine with 61% overall yield employing protectiondeprotection strategy. Different parameters affecting the impurities content and yield of D-cycloserine have been studied. Mild reaction conditions provided the product with remarkable purity (>99%) and high stability.
New Benchmark in DNA-Based Asymmetric Catalysis: Prevalence of Modified DNA/RNA Hybrid Systems
作者:Nicolas Duchemin、Sidonie Aubert、João V. de Souza、Lucas Bethge、Stefan Vonhoff、Agnieszka K. Bronowska、Michael Smietana、Stellios Arseniyadis
DOI:10.1021/jacsau.2c00271
日期:2022.8.22
chirality of the DNA double helix, chemists have been able to obtain new, reliable, selective, and environmentally friendly biohybrid catalytic systems with tailor-made functions. Nonetheless, despite all the advances made throughout the years in the field of DNA-basedasymmetriccatalysis, many challenges still remain to be faced, in particular when it comes to designing a “universal” catalyst with
通过利用 DNA 双螺旋的手性,化学家们已经能够获得具有定制功能的新型、可靠、选择性和环境友好的生物混合催化系统。尽管如此,尽管多年来在基于 DNA 的不对称催化领域取得了所有进展,但仍然面临许多挑战,特别是在设计具有广泛反应性和前所未有的选择性的“通用”催化剂时。合理的设计和多轮选择使我们能够接近这个目标。我们在此报告了一种具有共价连接联吡啶配体的 DNA/RNA 混合催化系统的开发,该系统在当前 DNA 工具箱中表现出无与伦比的选择性水平,并为不对称催化开辟了新途径。
Convenient method for the kinetic resolution of β-aminoalcohols
作者:Béatrice Pelotier、Ghislaine Priem、Simon J.F. Macdonald、Mike S. Anson、Richard J. Upton、Ian B. Campbell
DOI:10.1016/j.tetlet.2005.10.111
日期:2005.12
A variety of easily removable protecting groups were tested in the kinetic resolution of N-protected beta-aminoalcohols using chiral catalysts derived from N-4'-pyridinyl-alpha-methyl proline. The trifluoroacetyl group was the most promising protecting group as it gave the highest selectivities with all alcohols tested and can easily be removed without loss of enantiomeric excess. This strategy constitutes a convenient method for the kinetic resolution of beta-aminoalcohols. (c) 2005 Elsevier Ltd. All rights reserved.