Transition Metal-free Methylation of Amines with Formaldehyde as the Reductant and Methyl Source
作者:Nikki Y. T. Man、Wanfang Li、Scott G. Stewart、Xiao-Feng Wu
DOI:10.2533/chimia.2015.345
日期:——
A simple transition metal-free procedure using formaldehyde for the N,N-dimethylation and N-methylation of primary and secondary anilines is reported. The reaction showed limitations on sterically hindered and electron-withdrawing anilines, but is successful on amines with electron-donating substituents. Formaldehyde acts as both the reducing agent and the carbon source in the reaction.
Allylic Oxidations Catalyzed by Dirhodium Catalysts under Aqueous Conditions
申请人:Doyle Michael P.
公开号:US20090093638A1
公开(公告)日:2009-04-09
The present invention relates to compositions and methods for achieving the efficient allylic oxidation of organic molecules, especially olefins and steroids, under aqueous conditions. The invention concerns the use of dirhodium (II,II) “paddlewheel complexes, and in particular, dirhodium carboximate and tert-butyl hydroperoxide as catalysts for the reaction. The use of aqueous conditions is particularly advantageous in the allylic oxidation of 7-keto steroids, which could not be effectively oxidized using anhydrous methods, and in extending allylic oxidation to enamides and enol ethers.
OPIOID RECEPTOR LIGANDS AND METHODS OF USING AND MAKING SAME
申请人:Yamashita Dennis
公开号:US20120245181A1
公开(公告)日:2012-09-27
This application describes compounds that can act as opioid receptor ligands, which compounds can be used in the treatment of, for example, pain and pain related disorders.
这种应用描述了可以作为阿片受体配体的化合物,这些化合物可以用于治疗例如疼痛和与疼痛相关的疾病。
-methyl--anilinomethyl diphenylphosphine oxide: a versatile reagent for the synthesis of enamines
作者:N.L.J.M. Broekhof、F.L. Jonkers、A. van der Gen
DOI:10.1016/s0040-4039(00)92836-3
日期:1980.1
Cyclic as well as acyclic ketones, both saturated and α,β-unsaturated, can be converted into their homologous enamines by Horner-Wittig reaction with -methyl--anilinomethyl diphenylphosphine oxide ().
One-Pot Synthesis of α-Halo β-Amino Acid Derivatives via the Difunctional Coupling of Ethyl α-Diazoacetate with Silyl Halides and N,O-Acetals or Aromatic Tertiary Amines
nucleophile and N,O-acetals as an electrophile under metal-free conditions is described. This process undergoes a novel three-component coupling (3-CC) reaction using EDA, which leads to a one-pot preparation of α-halo β-amino acid esters. Also, this protocol could be adapted to accept an electrophile composed of aromatic tertiary amines. In both 3-CC reactions, the key reaction intermediate is an iminium