Enantioselective Transfer Aminoallylation: Synthesis of Optically Active Homoallylic Primary Amines
作者:Masaharu Sugiura、Chieko Mori、Shū Kobayashi
DOI:10.1021/ja064106r
日期:2006.8.1
A camphorquinone-derived chiral homoallylic amine was found to react with various aldehydes via imine formation and asymmetric 2-azonia-Cope rearrangement to give opticallyactive homoallylic primary amines. A practical level of enantioselectivity with high functional group tolerance has been attained in this transformation.
New Generation of Highly Reactive Allylborating Agents For Cu(I)-Catalyzed Allylation of Chiral Sulfinylimines
作者:Michael S. Alexeev、Tatyana V. Strelkova、Michail M. Ilyin, Jr.、Yulia V. Nelyubina、Ivan A. Bespalov、Michael Medvedev、Victor N Khrustalev、Nikolai Kuznetsov
DOI:10.1039/d4ob00291a
日期:——
active reagents is an attractive strategy that meets the modern principles of sustainable development of chemistry. In the current study, we for the first time describe the method and general principles of Cu(I)-catalyzed allylation of imines with amine adducts of allylic triorganoboranes. Triallylborane is an extremely reactive compound and cannot be used for the catalytic allylation of imines, whereas
使用高活性试剂实施选择性催化过程是一种有吸引力的策略,符合化学可持续发展的现代原则。在本研究中,我们首次描述了Cu( I )催化亚胺与烯丙基三有机硼烷胺加合物的烯丙基化反应的方法和一般原理。三烯丙基硼烷是一种极其活泼的化合物,不能用于亚胺的催化烯丙基化,而其胺加合物是理想的催化底物。胺片段的结构成功地平衡了烯丙基硼试剂的安全性、选择性和稳定性,使其在催化烯丙基化反应中表现出高活性,超过任何已知的烯丙基硼烷许多倍。获得的结果得到定量动力学数据和 DFT 计算的支持。该系统的催化功效在亚磺酰亚胺模型(23 个例子)上得到了证明。实现了高达 >99% 的高非对映选择性,包括克级合成 2-羟基苯基衍生物。考虑到三烯基硼烷(AAT)的胺加合物的高反应活性和无与伦比的原子经济性,它们可以被认为是Cu( I )和其他合适金属催化剂的潜在烯丙基化试剂。
Lipase catalysis in the preparation of 3-(1-amino-3-butenyl)pyridine enantiomers
作者:Ari Hietanen、Tiina Saloranta、Reko Leino、Liisa T. Kanerva
DOI:10.1016/j.tetasy.2012.09.003
日期:2012.12
The kinetic resolution of 1-(3-pyridyl)buten-3-ylamine with activated and non-activated acyl donors and Burkholderia cepacia lipase (lipase PS-D) under dry conditions has been studied. The N-acylation in isopropyl acetate (E > 100) and the acidic hydrolysis of the (R)-amide produced gave the corresponding enantiomerically enriched amines. (C) 2012 Elsevier Ltd. All rights reserved.
Asymmetric Synthesis of δ-Substituted α,β-Unsaturated δ-Lactams by Ring Closing Metathesis of Enantiomerically Pure <i>N</i>-Acryloyl-homoallylic Amines
作者:Claudio Fiorelli、Diego Savoia
DOI:10.1021/jo0703000
日期:2007.8.1
Optically pure secondary homoallylic amines, obtained by highly diastereoselective addition of allylmetal reagents to imines derived from chiral amines, were N-dealkylated, and the primary amines were converted to N-acryloyl amides. Then, ring closing metathesis gave delta-substituted delta-lactams in good overall yields.