41419-25-4Relevant articles and documents
Method for synthesizing lactam derivative without catalyst
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Paragraph 0046-0049, (2019/07/10)
The invention discloses a simple synthesis method for a lactam derivative. The method comprises the step that with formamide as an amine source and a hydrogen donor (hydrolyzed to produce formic acid)and keto acid as raw materials, the lactam derivative is easily synthesized through a cycloamination reaction without a solvent or a catalyst. Compared with previous reports, the time required for the reaction is greatly shortened, the selectivity is remarkably improved, the conversion rate of the keto acid derivative is 99%, and the yield of the lactam derivative can reach 70-94%.
An Efficient Two-Step Preparation of α-, β-, γ- or δ-Amino Acids from 2-Pyrazinones, 2-Hydroxypyrimidines or 2-Pyridones Respectively
Zacharie, Boulos,Abbott, Shaun D.,Baigent, Christopher B.,Doyle, Christopher,Yalagala, Ravi Shekar
, p. 6486 - 6493 (2018/11/23)
A practical and efficient two-step procedure is reported for the preparation of a variety of α-, β-, γ- and δ-amino acids from 2-pyridone, 2-pyrazinone or 2-hydroxypyrimidine and derivatives. The procedure is amenable to scale-up and in most cases no chromatographic purification of the product is required. This approach is useful, especially in the synthesis of amino acids or deuterated amino acids that are not obtained by other methods.
Stereoselective nucleophilic addition reactions to cyclic n-acyliminium ions using the indirect cation pool method: Elucidation of stereoselectivity by spectroscopic conformational analysis and dft calculations
Mitsudo, Koichi,Yamamoto, Junya,Akagi, Tomoya,Yamashita, Atsuhiro,Haisa, Masahiro,Yoshioka, Kazuki,Mandai, Hiroki,Ueoka, Koji,Hempel, Christian,Yoshida, Jun-ichi,Suga, Seiji
, p. 1192 - 1202 (2018/06/04)
In this study, six-membered N-acyliminium ions were generated by the “indirect cation pool” method and reacted with several nucleophiles. These reactions afforded disubstituted piperidine derivatives with high diastereoselectivities and good to excellent