The influence of substituents on the photochemical generation and stability of 2-morpholinocyclopropanols
摘要:
By irradiation in oxygen-free ether alpha- or beta-substituted beta-morpholinopropiophenones 1a-c form the corresponding cyclopropanols 2 with 1-aryl and 2-morpholino group in a relative cis-configuration in high yields. The photocyclization of pure 1a-c enantiomers proceeds enantioselectively under these conditions. In methanol and presence of oxygen electronically excited 1c-h are converted to enaminones 3c-h via oxidation of intermediate cyclopropanols 2c-h. In the presence of electron-acceptor molecules this reaction apparently follows a SET mechanism.
Tunable and Diastereoselective Brønsted Acid Catalyzed Synthesis of β-Enaminones
作者:Ye-Won Kang、Yu Jin Cho、Seung Jin Han、Hye-Young Jang
DOI:10.1021/acs.orglett.5b03445
日期:2016.1.15
The Brønsted acid catalyzed Meyer–Schuster reaction of hemiaminals was studied for the stereoselective synthesis of β-enaminones. Hemiaminals were formed from propargyl aldehydes (or the oxidation of propargyl alcohols) and amines in the presence of Brønsted acids. A critical step to control the stereochemistry of the products is the protonation of the corresponding allenol intermediate, which is dictated
Silver-catalyzed efficient synthesis of enaminones from propargyl alcohols and amines
作者:Mengshun Li、Dongmei Fang、Feng Geng、Xianping Dai
DOI:10.1016/j.tetlet.2017.09.054
日期:2017.12
Enaminones are used as the key intermediates to construct heterocyclic compounds with various bioactivities. In this study, a simple and efficient approach for the synthesis of enaminones via amination of propargyl alcohols was developed. Under the catalysis of Ag2CO3, the reaction proceeded smoothly to afford the desired products in good yields. Preliminary mechanism experiments showed that Ag2CO3
烯胺酮用作构建具有各种生物活性的杂环化合物的关键中间体。在这项研究中,开发了一种通过炔丙醇胺化合成烯胺酮的简单有效的方法。在Ag 2 CO 3的催化下,反应顺利进行,以高收率得到所需产物。初步的机理实验表明,Ag 2 CO 3在反应过程中起着至关重要的作用。
Ueno, Satoshi; Shimizu, Ryosuke; Kuwano, Ryoichi, Angewandte Chemie - International Edition, 2009, vol. 48, p. 4543 - 4545
作者:Ueno, Satoshi、Shimizu, Ryosuke、Kuwano, Ryoichi
DOI:——
日期:——
Hager; Hanker, Journal of the American Pharmaceutical Association (1912), 1955, vol. 44, p. 138,141
作者:Hager、Hanker
DOI:——
日期:——
NOVIKOV L. S.; MEZHENTSEV V. A.; TISHCHENKO I. G., ZH. ORGAN. XIMII, 1979, 15, HO 10, 2221-2222
作者:NOVIKOV L. S.、 MEZHENTSEV V. A.、 TISHCHENKO I. G.