6261-22-9Relevant academic research and scientific papers
Unified Approach to Furan Natural Products via Phosphine-Palladium Catalysis
Chen, Violet Yijang,Kwon, Ohyun
supporting information, p. 8874 - 8881 (2021/03/17)
Polyalkyl furans are widespread in nature, often performing important biological roles. Despite a plethora of methods for the synthesis of tetrasubstituted furans, the construction of tetraalkyl furans remains non-trivial. The prevalence of alkyl groups in bioactive furan natural products, combined with the desirable bioactivities of tetraalkyl furans, calls for a general synthetic protocol for polyalkyl furans. This paper describes a Michael–Heck approach, using sequential phosphine-palladium catalysis, for the preparation of various polyalkyl furans from readily available precursors. The versatility of this method is illustrated by the total syntheses of nine distinct polyalkylated furan natural products belonging to different classes, namely the furanoterpenes rosefuran, sesquirosefuran, and mikanifuran; the marine natural products plakorsins A, B, and D and plakorsin D methyl ester; and the furan fatty acids 3D5 and hydromumiamicin.
Efficient and chemoselective hydrogenation of aldehydes catalyzed by well-defined PN3-pincer manganese(ii) catalyst precursors: An application in furfural conversion
Gholap, Sandeep Suryabhan,Dakhil, Abdullah Al,Chakraborty, Priyanka,Li, Huaifeng,Dutta, Indranil,Das, Pradip K.,Huang, Kuo-Wei
supporting information, p. 11815 - 11818 (2021/11/30)
Well-defined and air-stable PN3-pincer manganese(ii) complexes were synthesized and used for the hydrogenation of aldehydes into alcohols under mild conditions using MeOH as a solvent. This protocol is applicable for a wide range of aldehydes containing various functional groups. Importantly, α,β-unsaturated aldehydes, including ynals, are hydrogenated with the CC double bond/CC triple bond intact. Our methodology was demonstrated for the conversion of biomass derived feedstocks such as furfural and 5-formylfurfural to furfuryl alcohol and 5-(hydroxymethyl)furfuryl alcohol respectively.
Direct Access to Allenylphosphine Oxides via a Metal Free Coupling of Propargylic Substrates with P(O)H Compounds
Yang, Chun-Hua,Fan, Huihui,Li, Huimin,Hou, Shenyin,Sun, Xiangkun,Luo, Donghao,Zhang, Yinchao,Yang, Zhantao,Chang, Junbiao
supporting information, p. 9438 - 9441 (2019/11/20)
A direct and convenient approach for the coupling of propargylic substrates with diphenylphosphine oxide in the presence of Tf2O and 2,6-lutidine has been developed. The method provides a general approach for the construction of attractive allenylphosphoryl skeletons with high atom and step economy under metal free conditions.
Impaired energy processing disorders and mitochondrial deficiency
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Page/Page column 44, (2018/09/14)
Some aspects of the invention provide for a method of treating Impaired Energy Processing Disorders and Mitochondrial Deficiencies using polyunsaturated fatty acids which are modified in certain positions to attenuate oxidative damage by Reactive Oxygen Species (ROS) and/or suppress the rate of formation of reactive products and toxic compounds.
A tea canker-worm pheromone (Z, Z, Z) - 3, 6, 9 - triene synthetic method of eighteen carbon (by machine translation)
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Paragraph 0030; 0032, (2018/09/28)
The invention relates to a natural [...] pheromone component novel synthesis method, in particular relates to a tea canker-worm pheromone (Z, Z, Z) - 3, 6, 9 - eighteen carbon triene synthetic method, it has [...], is non-toxic and harmless, which belongs to the field of drug synthesis. The invention uses inexpensive and easily obtained a halopropynyl alcohol as the reaction of the starting material, in order to iodo reagent catalytic coupling reaction as a key step, after six-step reaction, smooth synthetic tea canker-worm pheromone (Z, Z, Z) - 3, 6, 9 - eighteen carbon triene, the operation is simple, low cost, easily obtained and cheap materials, mild reaction conditions, high yield, the large scale preparation. (by machine translation)
Highly enantioselective nickel-catalyzed intramolecular reductive cyclization of alkynones
Fu, Wenzhen,Nie, Ming,Wang, Aizhen,Cao, Ziping,Tang, Wenjun
supporting information, p. 2520 - 2524 (2015/03/04)
The first asymmetric nickel-catalyzed intramolecular reductive cyclization of alkynones is reported. A P-chiral monophosphine and triethylsilane were used as the ligand and the reducing reagent, respectively, to form a series of tertiary allylic alcohols bearing furan/pyran rings in excellent yields and enantioselectivities. This reaction has a broad substrate scope and enabled the efficient synthesis of dehydroxycubebin and chiral dibenzocyclooctadiene skeletons.
PROCESS FOR THE MANUFACTURE OF 2-PENTYN-1-OL
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Page/Page column 8-9, (2012/08/08)
The present invention is directed to a process for the manufacture of 2-pentyn-1-ol starting from 2-propyn-1-ol via the following intermediates (I), (II) wherein R1 is H or linear C1-6 alkyl, R2 is linear C1-6 alkyl or branched C3-6 alkyl and R3 is linear C1-6 alkyl, as well as to the intermediates themselves.
METHOD FOR THE SYNTHESIS OF DHA
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Page/Page column 39-41, (2012/10/08)
A method for preparing docosahexaenoic acid (DHA). The method comprises coupling a compound represented by Formula I with a compound represented by Formula II followed by partial hydrogenation to obtain a compound represented by Formula III. The compound represented by Formula III acts as a DHA precursor and thus can be hydrolysed to obtain DHA. Novel starting materials represented by Formula I and Formula II, and synthetic routes for preparing the same are also provided.
ALLEVIATING OXIDATIVE STRESS DISORDERS WITH PUFA DERIVATIVES
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Page/Page column 19, (2011/05/08)
Some aspects of the invention provide for essential fatty acids which are substituted in specific positions to slow down oxidative damage by Reactive Oxygen Species (ROS), and to suppress the rate of consequent formation of reactive products, for the purpose of preventing or reducing the damage associated with oxidative stress associated diseases such as neurological diseases and age-related macular degeneration (AMD).
Stereoselective total synthesis of (+)-mueggelone, a novel inhibitor of fish development
Yadav,Somaiah,Ravindar,Chandraiah
, p. 2848 - 2850 (2008/09/20)
An efficient stereoselective total synthesis of (+)-mueggelone, a novel inhibitor of fish development, is described. Highlights of the strategy include the utilization of Sharpless asymmetric epoxidation, Yamaguchi lactonization and an olefin cross-metathesis as the key steps.
