Synthetic cascades are enabled by combining biocatalysts with artificial metalloenzymes
作者:V. Köhler、Y. M. Wilson、M. Dürrenberger、D. Ghislieri、E. Churakova、T. Quinto、L. Knörr、D. Häussinger、F. Hollmann、N. J. Turner、T. R. Ward
DOI:10.1038/nchem.1498
日期:2013.2
within a host protein affords an artificial transfer hydrogenase (ATHase) that is fully compatible with and complementary to natural enzymes, thus enabling efficient concurrent tandem catalysis. To illustrate the generality of the approach, the ATHase was combined with various NADH-, FAD- and haem-dependent enzymes, resulting in orthogonal redox cascades. Up to three enzymes were integrated in the cascade
酶催化和均相催化提供互补的方法来应对化学和生物学中的合成挑战。尽管具有吸引力,但由于两种催化剂的相互失活,将有机金属催化剂与酶结合的并发级联反应的实施已被证明具有挑战性。为了解决这个问题,我们表明结合 a d 6宿主蛋白质中的钢琴粪便复合物提供了一种与天然酶完全兼容和互补的人工转移氢化酶 (ATHase),从而实现高效的并发串联催化。为了说明该方法的通用性,将 ATHase 与各种 NADH、FAD 和血红素依赖性酶结合,产生正交氧化还原级联反应。多达三种酶被整合到级联中并与 ATHase 结合,以实现 (i) 双立体选择性胺去消旋,(ii) 辣根过氧化物酶偶联的转移氢化酶活性读数,以实现其遗传优化,(iii)从L形成L-哌啶酸-赖氨酸和 (iv) NADH 的再生以促进单加氧酶催化的氧化功能化反应。
[EN] MOLECULARLY IMPRINTED POLYMERS SELECTIVE FOR NITROSAMINES AND METHODS OF USING THE SAME<br/>[FR] POLYMERES A EMPREINTES MOLECULAIRES SELECTIFS DES NITROSAMINES ET PROCEDES D'UTILISATION DESDITS POLYMERES
申请人:MIP TECHNOLOGIES AB
公开号:WO2005112670A1
公开(公告)日:2005-12-01
A class of molecularly imprinted polymers that specifically recognizes and binds to nitrosamines members of which class are useful, for example, in analysis and separation of nitrosamines from biological fluids. Such molecularly imprinted polymers are also useful in methods of treating and manufacturing tobacco products and materials.
A method for preparing nicotine. (1) The nicotinic acid alkyl ester and N-methylpyrrolidone are subjected to a condensation reaction, and then added with a strong acid to obtain 4-methylamino-1-(3-pyridine)-butanone hydrochloride. (2) The 4-methylamino-1-(3-pyridine)-butanone hydrochloride is reacted with an amino-protecting reagent to obtain an intermediate (4). (3) A chiral alcohol (5) is obtained through an asymmetric reduction. (4) The chiral alcohol (5) is converted into the nicotine through a two-step reaction.
Compositions and methods for treating nasal and paranasal mucosa diseases with nicotinic acetylcholine receptor agonists
申请人:Solis Herrera Arturo
公开号:US10639300B2
公开(公告)日:2020-05-05
Methods of treating and preventing conditions of a nasal or paranasal mucous membrane are described. The methods include administering a pharmaceutical composition including a nicotinic acetylcholine receptor (nAChR) agonist, such as (S)-(1-methyl-2-pyrrolidinyl)-pyridine, or a pharmaceutically acceptable salt, analog, precursor or derivative thereof. The methods can be used to treat a wide variety of conditions of the nasal or paranasal mucous membrane, such as nasal congestion and nose bleeds.