An Organocatalytic Asymmetric Synthesis of Chiral β,β-Diaryl-α-amino Acids via Addition of Azlactones to In Situ Generated <i>para</i>
-Quinone Methides
作者:Jiyao Yan、Min Chen、Herman H-Y. Sung、Ian D. Williams、Jianwei Sun
DOI:10.1002/asia.201800569
日期:2018.9.4
An organocatalytic intermolecular C−C bond formation process leading to the efficient synthesis of chiralβ,β‐diaryl‐α‐amino acid derivatives is described. In the presence of a suitable chiral phosphoric acid catalyst, a range of para‐hydroxybenzyl alcohols serve as efficient precursors to para‐quinone methides and then react with azlactones in 1,6‐conjugate addition reactions. The asymmetric control
New Histamine H<sub>3</sub>-Receptor Ligands of the Proxifan Series: Imoproxifan and Other Selective Antagonists with High Oral in Vivo Potency
作者:Astrid Sasse、Bassem Sadek、Xavier Ligneau、Sigurd Elz、Heinz H. Pertz、Peter Luger、C. Robin Ganellin、Jean-Michel Arrang、Jean-Charles Schwartz、Walter Schunack、Holger Stark
DOI:10.1021/jm000971p
日期:2000.8.1
HistamineH(3)-receptor antagonists of the proxifan series are described. The novel compounds possess a 4-(3-(phenoxy)propyl)-1H-imidazole structure and various functional groups, e.g., an oxime moiety, on the phenyl ring. Synthesis of the novel compounds and X-ray crystallography of one highly potent oxime derivative, named imoproxifan (4-(3-(1H-imidazol-4-yl)propyloxy)phenylethanone oxime), are described
描述了proxifan系列的组胺H(3)-受体拮抗剂。该新型化合物具有4-(3-(苯氧基)丙基)-1H-咪唑结构和在苯环上的各种官能团,例如肟部分。描述了新型化合物的合成和一种名为imoproxifan(4-(3-(1H-咪唑-4-基)丙氧基)苯乙酮肟)的高效肟衍生物的X射线晶体学。大多数标题化合物在体内以及在口服给药后的小鼠CNS体内在组胺H(3)-受体测定中均具有很高的拮抗剂效力。讨论了构效关系。在对大鼠大脑皮层突触小体的功能测定中,Imoproxifan表现出亚纳摩尔效价(K(i)= 0.26 nM)。在体内,莫洛昔芬以0.034 mg / kg po的ED(50)升高中心N(tau)-甲基组胺水平。
Method for the aminoalkylation of phenol
申请人:American Cyanamid Company
公开号:US04259486A1
公开(公告)日:1981-03-31
The present invention relates to the aminoalkylation of phenol with 4-(alkenyl)morpholines, preferably in the presence of lithium chloride. The present invention further relates to the p-(morpholinoalkyl)phenols obtained by the above method.
The reaction of para-hydroxybenzyl alcohols with ferrocene in the presence of a catalytic amount of InCl₃ provided ferrocenyl phenol derivatives, an interesting class of organometallic compounds with potential applications in medicinal chemistry. This transformation exhibited a reasonable substrate scope delivering the desired products in synthetically useful yields. Evidence of involvement of a para-quinone
A Study of the Reactivity of (Aza‐)Quinone Methides in Selective C6‐Alkylations of Indoles
作者:Jiyao Yan、Zhihan Zhang、Min Chen、Zhenyang Lin、Jianwei Sun
DOI:10.1002/cctc.202000850
日期:2020.10.20
The kinetic and thermodynamic features of indole N1‐ and C6‐alkylation reactions with (aza‐)quinonemethides have been studied. The electrophilic reactivity of these quinonemethides have also been compared for the first time by both experiments and DFT calculations. The indole N1‐alkylation is typically kinetically favorable, but the C6‐alkylation is more thermodynamically favorable. With suitable