Alkylative Amination of Biogenic Furans through Imine-to-Azaallyl Anion Umpolung
摘要:
Starting from biogenic furfurals, an operationally simple and scalable condensation-umpolung-alkylation protocol was employed in the synthesis of racemic furfurylamines. Subsequent enzymatic kinetic resolution by -transaminase or lipase biocatalysts allows for the preparation of functionalized heterocyclic building blocks from biogenic base chemicals in optically pure form.
α-Aminoallylation of aldehydes in aqueous ammonia has been developed; commercial aqueous ammonia was successfully used, and this method does not require anhydrous conditions thus leading to easy and practical operations.
Acceleration effect of mild organocatalytic system 2,2′-biphenol/B(OH)3 for 2-aza-Cope rearrangement
作者:Kenji Sugimoto、Ryoga Yoshida、Yuji Matsuya
DOI:10.1016/j.tetlet.2022.153922
日期:2022.7
for 2-aza-Cope rearrangement is described. Aldehydes and 1,1-diphenyl homoallylamine were converted into the corresponding homoallylamines in moderate-to-high yield in the presence of 10 mol% 2,2′-biphenol and 30 mol% B(OH)3. In contrast to the conventional 2-aza-Cope rearrangement catalyzed by strong activators, a user- and environment-friendly organocatalytic system was established using a combination
Gold(I)−Catalyzed Synthesis of Cyclic Sulfamides via an Intramolecular Dehydrative Amination of Allylic Alcohols: A Strategy for 1,3‐Diamine Synthesis
作者:Soyun Lee、Da Mi Kim、Jae‐Sang Ryu
DOI:10.1002/adsc.202400280
日期:2024.8.6
stereoselective synthesis of natural products or bioactive compounds containing 1,3-diamine scaffold. Scheme 2 Open in figure viewerPowerPoint Comparison of gold(I)-catalyzed synthesis of cyclic sulfamidate and cyclic sulfamide. Building upon the success and insights gained from our previous work, we present herein an update to our methodology, focusing on the gold(I)-catalyzed synthesis of cyclic sulfamides