Synthesis of Piperidine Derivatives by Rhodium- Catalyzed Tandem Reaction of<i>N</i>-Sulfonyl-1,2,3-Triazole and Vinyl Ether
作者:Sisi Yu、Yuehui An、Wenlin Wang、Ze-Feng Xu、Chuan-Ying Li
DOI:10.1002/adsc.201800191
日期:2018.6.5
A chemoselective tandemreaction of 4‐acyloxymethylene‐1‐sulfonyl‐1,2,3‐triazole and vinyl ether was reported, producing polysubstituted piperidinederivatives in up to 96% yield. The key intermediate N‐sulfonyl 1‐azadiene generated by migration of the OAc group to the α‐imino rhodium carbene was isolated and a plausible mechanism was proposed. Several related ring systems were constructed from the
high affinity and selectivity at the DA D3receptor is reported here. Compounds endowed with high selectivity over the hERG channel were identified and their pharmacokinetic properties thoroughly analyzed. A few derivatives with appropriate developability characteristics were selected for further studies and progression along the screening cascade. In particular, derivative 60a, (DA D3 pKi = 8.4, DA D2
本文报道了一系列新的1,2,4-三唑基八氢吡咯并[2,3- b ]吡咯在DA D3受体上表现出高亲和力和选择性。鉴定了在hERG通道上具有高选择性的化合物,并对其药代动力学特性进行了全面分析。选择了一些具有适当可显影性的衍生物,以进一步研究并沿着筛选级联进行。特别地,衍生物60a(DA D3 p K i = 8.4,DA D2 p K i = 6.0和hERG fp K i = 5.2)显示出平衡的分布,并且围绕该分子进行进一步的改进。
General solvent-free highly selective N-tert-butyloxycarbonylation strategy using protic ionic liquid as an efficient catalyst
作者:Swapan Majumdar、Jhinuk De、Ankita Chakraborty、Dilip K. Maiti
DOI:10.1039/c4ra02670e
日期:——
transformation of amines to tert-butyloxycarbonyl protected derivatives (NHBoc) using Boc2O and imidazolium trifluoroacetate protic ionic liquid (5–20 mol%). Unwanted side products such as isocyanate, urea or N,N-di-Boc were not detected. The scope of the protection strategy was successfully explored for substrate alcohols, phenols and thiol at elevated temperatures. Optically pure amino acids, amino acid esters
bond between aromatic acid and 4-phenylthiazol-2-amine or 4-(4-bromophenyl)thiazol-2-amine. These thiazole derivatives have evaluated as potent FabH inhibitors. Nineteen compounds (4b–4h, 4k, 4l, 5a–5h, 5k, 5l) are reported for the first time. Most of the synthesized compounds exhibited antibacterial activity in the MTT assay. The MIC value of these compounds ranged from 1.56 μg/mL to 100 μg/mL. Moreover
Symmetry-based inhibitors of HIV protease. Structure-activity studies of acylated 2,4-diamino-1,5-diphenyl-3-hydroxypentane and 2,5-diamino-1,6-diphenylhexane-3,4-diol
作者:Dale J. Kempf、Lynnmarie Codacovi、Xiu Chun Wang、William E. Kohlbrenner、Norman E. Wideburg、Ayda Saldivar、Sudthida Vasavanonda、Kennan C. Marsh、Pamela Bryant
DOI:10.1021/jm00055a003
日期:1993.2
diol-based inhibitors. The oral bioavailability of inhibitor 19 in rats was 19%; however, the Cmax obtained failed to exceed the anti-HIV EC50 in vitro. Substantial plasma levels of potentinhibitors of the diol class were not obtained after oral administration in rats; however, the optimal combination of aqueous solubility and in vitro antiviral activity of several inhibitors support their potential use