Synthesis of α-aminoketones via selective reduction of acyl cyanides
作者:Andreas Pfaltz、Saeed Anwar
DOI:10.1016/s0040-4039(01)81341-1
日期:1984.1
Reduction of acyl cyanides with zinc in acetic acid in the presence of excess acetic anhydride leads to N-acetyl-α-aminoketones in good yields. An efficient three-step synthesis of 5-aminolevulinic acid by this method is described.
Provided is a group of active substances capable of inhibiting the proliferation of cancer cells and inhibiting inflammation, as well as suppressing bodily defense reactions to control autoimmune diseases, transplant rejections, and acute and chronic inflammatory reactions. The disclosed active substances may be generally represented by Formula I, below,
1
with R1-R4 comprising a range of substituents, and may be combined in a pharmaceutical composition with other active compounds and/or excipients, or delivered as a tautomer or physiologically tolerated salt of such a compound.
本发明提供了一组活性物质,它们能够抑制癌细胞增殖、抑制炎症、抑制身体防御反应,从而控制自身免疫性疾病、移植排斥以及急性和慢性炎症反应。所公开的活性物质一般可以用下式 I 表示、
1
R1-R4包括一系列取代基,可与其他活性化合物和/或赋形剂组合在药物组合物中,或作为此类化合物的同分异构体或生理耐受盐递送。
1-butane acid derivatives pharmaceutical compositions containing said derivatives and the use thereof
申请人:——
公开号:US20040266873A1
公开(公告)日:2004-12-30
The invention relates to new butane acid derivatives comprising a cyanide group, pharmaceutical compositions containing said butane acid derivatives and the use of said butane acid derivatives in the production of pharmaceutical compositions for treating various illnesses.
Carbomethoxypropionyl cyanide: A regioselective C-acylation reagent for the preparation of β-dicarbonyl compounds
作者:Qing Tang、Stephanie E. Sen
DOI:10.1016/s0040-4039(98)00284-6
日期:1998.4
Carbomethoxypropionyl cyanide reacts regioselectively with a variety of enolates to provide C-acylation products in high yield. (C) 1998 Elsevier Science Ltd. All rights reserved.
Facile Synthesis of a “Ready to Use” Precursor of Porphobilinogen and Its Amino Acid Derivatives
[GRAPHICS]A practical synthesis of porphobilinogen based on the biosynthetic mechanism is described. The crossed Mukayiama. aldol reaction is the key step creating the central carbon-carbon bond between the two protected forms of 5-aminolevulinic acids. The optimized sequence gives a crystalline, storable precursor, which can be transformed in high yield into porphobilinogen and bioconjugates thereof. The enzymatic hydrolysis of the precursor produces porphobilinogen in quantitative yield.