Quantitative Solid-State Reactions of Amines with Carbonyl Compounds and Isothiocyanates
作者:Gerd Kaupp、Jens Schmeyers、Juergen Boy
DOI:10.1016/s0040-4020(00)00511-1
日期:2000.9
solid anhydrides to give diamides (therefrom imides) or amidic carboxylic salts or imides, with solid imides to give diamides, with solid lactones or carbonates to give functionalized carbamic esters, with polycarbonates to give degradative aminolysis, and with solid isothiocyanates to give thioureas. Diamides give imides by solid-state thermolysis or acid catalysis. Various double, two-step, 3-cascade
The present invention relates to the use of dendrimers with monophosphonic or bisphosphonic terminations in order to stimulate the growth of cell cultures or to activate cells in culture.
本发明涉及在细胞培养中使用具有单磷酸或双磷酸端基的树枝状聚合物,以促进细胞培养的生长或激活细胞。
Efficient Synthesis of New 4-Arylideneimidazolin-5-ones Related to the GFP Chromophore by 2+3 Cyclocondensation of Arylideneimines with Imidate Ylides
作者:Janusz Kowalik、Anthony Baldridge、Laren Tolbert
DOI:10.1055/s-0029-1218796
日期:2010.7
A 2+3 condensation of a wide assortment of Schiff bases, prepared from aromatic aldehydes and primary amines, with methyl 2-(1-ethoxyethylideneamino)acetate allows convenient access to an extensive family of substituted 4-arylideneimidazolin-5-one analogues of the green fluorescent protein (GFP) chromophore. 4-arylideneimidazolin-5-one - azomethine ylide - Schiff bases - heterocycle - 2+3 cycloaddition
<i>N</i>-Nitrosobenzylmethylamine Hydroxylation and Coumarin 7-Hydroxylation: Catalysis by Rat Esophageal Microsomes and Cytochrome P450 2A3 and 2A6 Enzymes
作者:Linda B. von Weymarn、Nadia D. Felicia、Xinxin Ding、Sharon E. Murphy
DOI:10.1021/tx990128y
日期:1999.12.1
respectively. Both enzymes catalyzed methylene hydroxylation at least 4-fold more efficiently than methyl hydroxylation. In addition, P450 2A6, but not P450 2A3, catalyzed benzyl ring hydroxylation, generating N-(p-hydroxybenzyl)methylamine. The identity of this metabolite was confirmed by synthesis of a standard and LC/MS and LC/MS/MS analysis. P450 2A6 is an efficient coumarin 7-hydroxylase, and
modified method and its application as an efficient promoter was demonstrated for the mechanosynthesis of N-methyl imines using ball milling as a non-conventional process under solvent-free conditions. In this new protocol design, the bis-imidazole acted as a recyclable acid-scavenging agent. This efficient approach to the N-methyl imines displays a combination of the synthetic virtues of a non-conventional