Biotechnological Production of Odor-Active Methyl-Branched Aldehydes by a Novel α-Dioxygenase from <i>Crocosphaera subtropica</i>
作者:Andreas K. Hammer、Florian Albrecht、Friederike Hahne、Paulina Jordan、Marco A. Fraatz、Jakob Ley、Torsten Geissler、Jens Schrader、Holger Zorn、Markus Buchhaupt
DOI:10.1021/acs.jafc.0c02035
日期:2020.9.23
anteiso-fatty aldehydes represent promising candidates for applications in flavoring preparations. A novel cyanobacterial α-dioxygenase from Crocosphaera subtropica was heterologously expressed in Escherichia coli and applied for the biotechnological production of C12–C15 branched-chain fattyaldehydes. The enzyme has a sequence identity of less than 40% to well-investigated α-dioxygenase from rice. Contrary
由于其令人愉悦的气味质量和较低的气味阈值,异-和反-异脂肪醛代表了在调味品制剂中应用的有前途的候选者。一种亚热带鳄鳄的新型蓝细菌α-双加氧酶在大肠杆菌中异源表达,并用于生物技术生产C 12 -C 15支链脂肪醛。该酶与水稻中经过充分研究的α-双加氧酶的序列同一性小于40%。与后者相反,它有效地转化了短链脂肪酸。通过氧耗竭试验研究了α-双加氧酶对非支链和异支链底物的动力学参数。转型产品(C对12 –C 15异醛和前异醛进行了广泛表征,包括其感官特性。醛类表现出绿色的甜味,带有柑橘类,金属,胡椒和咸味的细微差别。此外,这两种C 14异构体在空气中的气味阈值极低,分别为0.2和0.3 ng / L(通过气相色谱-嗅觉法测定)。
METHOD FOR PRODUCING CROSS-COUPLING COMPOUND
申请人:Fujimori Taketoshi
公开号:US20100048929A1
公开(公告)日:2010-02-25
To provide a method for performing a cross-coupling reaction of a Grignard compound with an alkyl halide simply, efficiently and in high yield, a method for obtaining a ω-bromo long chaincarboxylic acid simply and efficiently using an easily obtainable raw material and a method for producing a useful branched fatty acid simply and efficiently.
[R
1
: an alkyl group having 1 to 15 carbon atoms, R
2
: an alkyl group having 1 to 30 carbon atoms with a carboxyl group and X and X′: a halogen atom]
[n: an integer of 9 to 17]
[n: an integer of 9 to 17, R
1a
: a branched alkyl group having 3 to 8 carbon atoms and X: a halogen atom]
The present invention is to provide a stabilized pharmaceutical composition for oral use containing 1-ethyl methylester 4-[[3-[p-(carboxyamidino)phenyl]-2-oxo-5-oxazolidinyl]meth yl]-1-piperazineacetate or a pharmaceutically acceptable salt thereof having an antagonistic action to GPIIb/IIIa receptor and an oily base. The present invention is to further provide a method for the manufacture of a stabilized pharmaceutical composition for oral use by compounding 1-ethyl methylester 4-[[3-[p-(carboxyamidino)phenyl]-2-oxo-5-oxazolidinyl]meth yl]-1-piperazineacetate or a pharmaceutically acceptable salt thereof with an oily base. The present invention is to furthermore provide a method for the stabilization of a pharmaceutical composition by compounding 1-ethyl methylester 4-[[3-[p-(carboxyamidino)phenyl]-2-oxo-5-oxazolidinyl]-met hyl]-1-piperazineacetate or a pharmaceutically acceptable salt thereof with an oily base.
As a negatively charged lipid that can stably add negative charges to the surface of vesicles without side effects, the carboxyl acid-type lipid of the following general formula [1]:
[wherein R1, R2 and R3 represent substituents of which one is represented by the following general formula [X]:
(wherein M is a hydrogen atom or monovalent cation, and m is an integer of 1 to 5 that represents the methylene chain length), and the other two are chained hydrocarbon groups; A1, A2 and A3 are the same or different substituents selected from the group consisting of C(O)O, CONH or NHCO; and n is an integer of 1 to 3 that represents the methylene chain length] is provided.
Small molecule anti-cancer compounds & related production process
申请人:Yang, Zhenhua
公开号:EP2361965A2
公开(公告)日:2011-08-31
A group of specific branched-chain fatty acids, with significant anticancer effects on human and animals; methods of making using either chemical synthesis or biosynthesis methods; and methods of treating cancer.