59574-65-1Relevant articles and documents
Synthesis of spacered cyclopropyl nucleoside analogues as potential antiviral agents
Csuk, Rene,Kern, Anja
, p. 8409 - 8422 (1999)
Novel spacered cyclopropane nucleoside analogues possessing both a hydroxyethyl group and an additional methylene spacer between the base and the ring were synthesized starting from 3-buten-1-ol. After tetrahydropyranylation, cyclopropanation, and reducti
Palladium nanoparticlesin situsynthesized onCyclea barbatapectin as a heterogeneous catalyst for Heck coupling in water, the reduction of nitrophenols and alkynes
Le, Van-Dung,Le, T. Cam-Huong,Chau, Van-Trung,Le, T. Ngoc-Duyen,Dang, Chi-Hien,Vo, T. To-Nguyen,Nguyen, Trinh Duy,Nguyen, Thanh-Danh
, p. 4746 - 4755 (2021/03/22)
This study develops an effective method for thein situsynthesis of palladium nanoparticles (PdNPs) usingCyclea barbatapectin as a green reducing and stabilizing reagent. The PdNP@pectin nanocomposite was well characterized by analysis techniques such as UV-vis, FTIR, EDX, XRD, SEM, HR-TEM and STEM-mapping. Crystalline PdNPs were found to be distributed in the size range of 1-25 nm with the highest frequency of 6-12 nm. PdNP@pectin exhibited excellent recyclable catalysis activity for the Heck coupling reaction in water medium. The kinetics and recyclability of nanoparticles were investigated for the catalytic reduction ofo-,m- andp-nitrophenol. The result showed a good catalysis efficiency with five successful recycles without compromising much. In particular, the nanocomposite was used as a catalyst for the conversion of alkynes intocis-alkenes with KOH/DMF as a hydrogenation source. The reaction was also utilized effectively for the synthesis of sex pheromones, includingPlutella xylostella((Z)-11-hexadecen-1-yl acetate) andCylas formicarius((Z)-3-dodecen-1-yl(E)-2-butenoate) with the total yields of 70% and 68%, respectively. Therefore, PdNPs supported onC. barbatapectin are promising catalysis materials for application in various fields.
Enantioselective Hydroformylation of 1-Alkenes with Commercial Ph-BPE Ligand
Yu, Zhiyong,Eno, Meredith S.,Annis, Alexandra H.,Morken, James P.
supporting information, p. 3264 - 3267 (2015/07/15)
A rhodium complex, in conjunction with commercially available Ph-BPE ligand, catalyzes the branch-selective asymmetric hydroformylation of 1-alkenes and rapidly generates α-chiral aldehydes. A wide range of terminal olefins including 1-dodecene were examined, and all delivered high enantioselectivity (up to 98:2 er) as well as good branch:linear ratios (up to 15:1). (Chemical Equation Presented).
Mechanistic studies of an isph-catalyzed reaction: Implications for substrate binding and protonation in the biosynthesis of isoprenoids
Chang, Wei-Chen,Xiao, Youli,Liu, Hung-Wen,Liu, Pinghua
scheme or table, p. 12304 - 12307 (2012/02/02)
Chosen handle: Mechanistic studies of the IspH-catalyzed reductive dehydroxylation of 4-hydroxy-3-methyl-2-(E)-1-diphosphate (HMBPP) to isopentenyl diphosphate and dimethylallyl diphosphate suggest that both the 4-OH group and the double bond of HMBPP may contribute to the formation of substrate-IspH complex. Labeling studies now show that the 4-hydroxy group of the substrate plays the dominant role in positioning the substrate in the enzyme active site.
O -substituted alkyl aldehydes for rhodium-catalyzed intermolecular alkyne hydroacylation: The utility of methylthiomethyl ethers
Parsons, Scott R.,Hooper, Joel F.,Willis, Michael C.
supporting information; experimental part, p. 998 - 1000 (2011/05/15)
Combining α-methylthiomethyl (MTM) ether substituted aldehydes and 1-alkynes in the presence of [Rh(dppe)]ClO4 results in efficient intermolecular alkyne hydroacylation to deliver α-O-MTM-substituted enone products. The product MTM ethers can be converted to the free hydroxyl group either in situ, by the addition of water to the completed reaction, or in a separate operation, by the action of silver nitrate.(Figure Presented)
Tetrahydropyridothienopyrimidine Compounds and Methods of Use Thereof
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Page/Page column 19, (2010/12/29)
This invention relates to compounds of Formula (I), wherein the variables are as disclosed in the specification, to pharmaceutical compositions containing them, to methods of making the compounds and pharmaceutical compositions, and to methods of using th
Stereocontrolled synthesis of 2-substituted-1,3-azasilaheterocycles
Hernandez, Dacil,Nielsen, Lone,Lindsay, Karl B.,Angeles Lopez-Garcia,Bjerglund, Klaus,Skrydstrup, Troels
supporting information; experimental part, p. 3528 - 3531 (2010/11/02)
(Equation Presented). Chiral α-silylsulfinamides, prepared by the treatment of an alkyldiphenylsilane with lithium followed by its addition to a sulfinimine, can be applied to the synthesis of 1,3-azasilaheterocycles as derivatives of cyclic alkaloids. Th
Total synthesis of (+)-cryptocaryalactone and of a diastereoisomer of (+)-strictifolione via ring-closing metathesis (RCM) and olefin cross-metathesis (CM)
Sabitha, Gowravaram,Vangala, Bhaskar,Reddy, S. Siva Sankara,Yadav, Jhillu S.
scheme or table, p. 329 - 338 (2010/05/15)
Ring-closing metathesis (RCM) and olefin cross-metathesis (CM) reactions were used as the key steps for the synthesis of (+)-cryptocaryalactone (1) and the first synthesis of the diastereoisomer 3 of (+)-strictifolione, starting from the commercially avai
Kinetic resolution of racemic 1 -alkyl-2-methylenecyclopropanes via palladium-catalyzed silaborative C-C cleavage
Ohmura, Toshimichi,Taniguchi, Hiroki,Suginome, Michinori
supporting information; scheme or table, p. 2880 - 2883 (2009/12/24)
Kinetic resolution of racemic 1-alkyl-2-methylenecyclopropanes via silaborative C-C cleavage was efficiently catalyzed by a palladium complex bearing a chiral phosphoramidite, affording 2-boryl-3-silylmathy 1-1 -alkenes as major products with up to 92% ee
Octahydroisoquinoline compounds as opioid receptor modulators
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Page/Page column 11-12, (2008/06/13)
Compounds which bind to opioid receptors are provided. In a preferred embodiment of the invention, the compounds are opioid receptor antagonists. The present invention also provides methods of treating conditions which are mediated by an opioid receptor.