Highly chemoselective reductive amination-coupling by one-pot reaction of aldehydes, HMDS and NaBH4
摘要:
An efficient and highly chemoselective synthesis of symmetrical secondary amines via reductive amination of aldehydes with inexpensive and commercially available HMDS and sodium borohydride in high to quantitative yields is reported. (C) 2008 Elsevier Ltd. All rights reserved.
Adducts of Triallylborane with Ammonia and Aliphatic Amines as Stoichiometric Allylating Agents for Aminoallylation Reaction of Carbonyl Compounds
作者:Nikolai Yu. Kuznetsov、Rabdan M. Tikhov、Tatiana V. Strelkova、Yuri N. Bubnov
DOI:10.1021/acs.orglett.8b01317
日期:2018.6.15
Triallylborane–amines adducts are effective stoichiometric allylating agents in the aminoallylation reaction of carbonyl compounds in methanol. Moreover, copper-catalyzed diastereoselective allylation of Ellman’s imine was achieved with triallylborane–methylamine adduct.
Synthesis of β-Phosphinolactams from Phosphenes and Imines
作者:Xingyang Fu、Xinyao Li、Jiaxi Xu
DOI:10.1021/acs.orglett.1c03182
日期:2021.11.19
Various cis-β-phosphinolactams are synthesized stereoselectively for the first time fromimines and diazo(aryl)methyl(diaryl)phosphine oxides under microwave irradiation. Diazo(aryl)methyl(diaryl)phosphine oxides first undergo the Wolf rearrangement to generate phosphenes. Imines nucleophilically attack the phosphenes followed by an intramolecular nucleophilic addition via less steric transition states
Annulation of Diaryl(aryl)phosphenes and Cyclic Imines to Access Benzo-δ-phospholactams
作者:Yun Luo、Jiaxi Xu
DOI:10.1021/acs.orglett.0c02346
日期:2020.10.16
Microwave-assisted annulation of cyclicimine dibenzo[b,f][1,4]oxazepines and diaryl(aryl)phosphenes generated from diazo(aryl)methyl(diaryl)phosphine oxides through the Wolff rearrangement accesses pentacyclic benzo-δ-phospholactams, 4b,16-dihydrodibenzo[b,f]benzo[4,5][1,2]azaphosphinino[1,6-d][1,4]oxazepine 15-oxides, in good yields.
Design, Synthesis, and <i>In Vitro</i> and <i>In Vivo</i> Biological Evaluation of Limonin Derivatives for Anti-Inflammation Therapy
作者:Ming Bian、Guohua Gong、Pang Lei、Huanhuan Du、Chunmei Bai、Chengxi Wei、Zheshan Quan、Qianqian Ma
DOI:10.1021/acs.jafc.1c04989
日期:2021.11.17
In this study, limonin derivatives were used to design new anti-inflammatory compounds with high pharmacological activity and low toxicity. A total of 23 new limonin derivatives were discovered, synthesized, and screened for their anti-inflammatory activity against lipopolysaccharide (LPS)-treated RAW 264.7 cells. Of them, compound f4 was found to be the most active, with a higher efficiency compared
在这项研究中,柠檬苦素衍生物用于设计具有高药理活性和低毒性的新型抗炎化合物。总共发现、合成了 23 种新的柠檬苦素衍生物,并筛选了它们对脂多糖 (LPS) 处理的 RAW 264.7 细胞的抗炎活性。其中,发现化合物f4活性最高,与柠檬苦素和塞来昔布相比具有更高的效率。随后,我们研究了f4活性的潜在机制,发现它通过阻断 LPS 处理的 RAW 264.7 细胞和小鼠中的 NF-κB/MAPK 信号通路来抑制促炎细胞因子。总之,f4可能是一种很有前途的抗炎先导化合物。
Novel Method for the Synthesis of α-Amino-α′-hydroxyalkylphosphinic Acids and Bis(α-aminoalkyl)phosphinic Acids: Nuclephilic Addition of α-Hydroxy-H-phosphinic Acids to Diimines
here a novel and simple method for the synthesis of α-amino-α′-hydroxyalkylphosphinic acids in good yields in two simple steps without any protection–deprotection steps. We have developed an efficient method for the synthesis of α-amino-α′-hydroxyalkylphosphinic acids via the reaction of easily available α-hydroxyalkylphosphinic acids with diimines. Treatment of α-hydroxyalkylphosphinic acids with diimines