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Showing 1-30 of 65 results for "139009" within Papers
Ning Zhu et al.
Journal of combinatorial chemistry, 12(4), 531-540 (2010-06-01)
The thiol-disulfide dynamic interchange reaction mediated by 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) was extensively studied. By this synthetic method sulfides can be prepared successfully within seconds in high yields at room temperature from stable and readily available disulfides and an alkylating agent. The
Alex Schudel et al.
Advanced healthcare materials, 4(10), 1484-1490 (2015-05-06)
A synthetic polymer nanoparticle formulation utilizing the physiological nitrosothiol chemistry for nitric oxide delivery is shown. Toxicity of S-nitroso nanoparticles against adult female Brugia malayi worms, which are responsible for lymphatic filariasis, is dependent on nitric oxide release through transnitrosation
Rózsa Hegedüs et al.
Biopolymers, 104(3), 167-177 (2015-03-11)
Daunorubicin-GnRH-III bioconjugates have recently been developed as drug delivery systems with potential applications in targeted cancer chemotherapy. In order to improve their biochemical properties, several strategies have been pursued: (1) incorporation of an enzymatic cleavable spacer between the anticancer drug
Shyam S Verma et al.
Carbohydrate research, 341(11), 1930-1937 (2006-05-16)
DBU catalyzed condensation of 3-O-benzyl(methyl)-5,6-dideoxy-1,2-O-isopropylidene-beta-L-threo-hept-4-enofuranuronates with different aldehydes produces the corresponding 3-O-benzyl(methyl)-6-carbethoxy-5,6-dideoxy-1,2-O-isopropylidene-7-phenyl-beta-L-threo-hept-4-enofuranoses. The latter on treatment with methanesulfonyl chloride followed by DBU catalyzed E2 reaction of the methanesulfonyloxy intermediates gave the respective 3-O-benzyl(methyl)-6-carbethoxy-5,6,7-trideoxy-1,2-O-isopropylidene-7-phenyl-beta-L-threo-hept-4,6-dienofuranose in moderate to good yields.
Matthew O'Reilly et al.
Dalton transactions (Cambridge, England : 2003), (31)(31), 6092-6095 (2010-05-08)
With the new chiral phosphine ligand DBUP, obtained from DBU and Ph(2)PCl, a remarkable anion effect was observed on the diastereoselective formation of the bischelated complexes [Ni(DBUP)(2)](X)(n) (X = Cl, Br, n = 2; X = NiCl(4), n = 1)
Ana Pascual et al.
Biomacromolecules, 16(4), 1169-1178 (2015-03-13)
In this study, a new family of broad-spectrum antimicrobial polycarbonate hydrogels has been successfully synthesized and characterized. Tertiary amine-containing eight-membered monofunctional and difunctional cyclic carbonates were synthesized, and chemically cross-linked polycarbonate hydrogels were obtained by copolymerizing these monomers with a
Claude Larrivée-Aboussafy et al.
Organic letters, 12(2), 324-327 (2009-12-18)
1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU) has been found to catalyze the amidation of acyl imidazoles. The rate acceleration is especially evident with traditionally unreactive, electron-deficient anilines. DBU is readily available and offers safety and cost advantages over more commonly employed catalysts such as
Mathieu Arnould et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 19(37), 12249-12253 (2013-08-21)
Dancing with diversity: The synthesis of diverse pyrido[2',1':2,3]imidazo[4,5-b]quinolines bearing several substitution patterns was developed based on combining a multicomponent reaction (Groebke-Blackburn-Bienaymé reaction) with an original cyclization as a secondary transformation (see scheme; DBU = 1,8-diazabicyclo[5.4.0]undec-7-ene).
Weili Ma et al.
Biomolecules, 8(3) (2018-07-11)
Retinoic acid (RA) is a bioactive lipid that has been shown to promote neural stem cell differentiation. However, the highly hydrophobic molecule needs to first solubilize and translocate across the cell membrane in order to exert a biological response. The
Sustainable succinylation of cellulose in a CO 2-based switchable solvent and subsequent Passerini 3-CR and Ugi 4-CR modification.
Soyler Z, et al.
Green Chemistry, 20(1), 214-224 (2018)
Joachim B Havla et al.
Toxicology in vitro : an international journal published in association with BIBRA, 24(3), 849-853 (2009-12-17)
Tissue engineering of autologous cartilage transplants is suggested as a new approach in reconstruction of external auricular deformities. 1.6-Hexanediol (HD), 1.8-diazabicyclo[5.4.0]undec-7-ene (DBU) and 6-hydroxyhexanoic acid (HHA) are matrices of the open-pored polyurethane three-dimensional scaffold. Since these bioresorbable materials may interact
Naoto Utsumi et al.
Organic letters, 10(16), 3405-3408 (2008-07-18)
Direct organocatalytic Mannich-type reactions of thioesters provide for the expedient and diastereoselective synthesis of protected beta-amino acids. A variety of thioesters were found to be reactive with different imines under mild conditions to provide beta-amino acids in good yields. This
1, 8-Diazabicyclo [5.4. 0] undec-7-ene (DBU)-promoted efficient and versatile aza-Michael addition.
Yeom C-E, et al.
Tetrahedron, 63(4), 904-909 (2007)
Gui-Ling Zhao et al.
Organic letters, 7(20), 4527-4530 (2005-09-24)
[reaction: see text] DBU-catalyzed reactions of salicylic aldehydes with 3-methylpenta-3,4-dien-2-one, 3-benzylpenta-3,4-dien-2-one, or ethyl 2-methylbuta-2,3-dienoate gave the corresponding functionalized 2H-1-chromenes in good to excellent yields and good diastereoselectivities in some cases in DMSO, respectively.
Wen-Chung Shieh et al.
The Journal of organic chemistry, 67(7), 2188-2191 (2002-04-02)
1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU) is an effective nucleophilic catalyst for carboxylic acid esterification with dimethyl carbonate (DMC). The reaction pathway of this new class of nucleophilic catalysis has been studied. A plausible, multistep mechanism is proposed, which involves an initial N-acylation of
Anupam Patgiri et al.
Nature protocols, 5(11), 1857-1865 (2010-10-30)
Stabilized α-helices and nonpeptidic helix mimetics have emerged as powerful molecular scaffolds for the discovery of protein-protein interaction inhibitors. Protein-protein interactions often involve large contact areas, which are often difficult for small molecules to target with high specificity. The hypothesis
Alex Schudel et al.
Nature nanotechnology, 15(6), 491-499 (2020-06-12)
Therapeutic delivery selectively to lymph nodes has the potential to address a variety of unmet clinical needs. However, owing to the unique structure of the lymphatics and the size-restrictive nature of the lymph node reticular network, delivering cargo to specific
Casper F T van der Ven et al.
Nanoscale, 13(48), 20451-20461 (2021-11-25)
Differential expression of microRNAs (miRNAs) plays a role in many diseases, including cancer and cardiovascular diseases. Potentially, miRNAs could be targeted with miRNA-therapeutics. Sustained delivery of these therapeutics remains challenging. This study couples miR-mimics to PEG-peptide gold nanoparticles (AuNP) and
Dengyou Zhang et al.
Chemical communications (Cambridge, England), 48(23), 2909-2911 (2012-02-07)
A practical Pd(PPh(3))(4)/DBU catalytic system for the synthesis of pharmaceutically relevant aminopyridine nitrile intermediates, as well as a variety of other aryl nitriles using non-toxic K(4)[Fe(CN)(6)] has been developed. The key features of our new protocol for cyanation lie in
Sang-Bae Lee et al.
Biomacromolecules, 16(8), 2265-2275 (2015-07-16)
This study reports a synthetic polymer functionalized with catechol groups as dental adhesives. We hypothesize that a catechol-functionalized polymer functions as a dental adhesive for wet dentin surfaces, potentially eliminating the complications associated with saliva contamination. We prepared a random
W C Shieh et al.
Organic letters, 3(26), 4279-4281 (2002-01-11)
1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU) is a novel and active catalyst in promoting the methylation reaction of phenols, indoles, and benzimidazoles with dimethyl carbonate under mild conditions. Additional rate enhancement is accomplished by applying microwave irradiation. By incorporating tetrabutylammonium iodide, the same microwave
Jack W Blount et al.
Journal of agricultural and food chemistry, 63(8), 2233-2240 (2015-02-12)
Grape seed polyphenolic extract (GSPE) rich in the flavan-3-ols (+)-catechin and (-)-epicatechin beneficially modulates Alzheimer's Disease phenotypes in animal models. The parent molecules in the extract are converted to a series of methylated and glucuronidated derivatives. To fully characterize these
Synlett, 3, 574-575 (2004)
Young H Lim et al.
ACS nano, 9(2), 1995-2008 (2015-01-27)
The development of well-defined polymeric nanoparticles (NPs) as delivery carriers for antimicrobials targeting human infectious diseases requires rational design of the polymer template, an efficient synthetic approach, and fundamental understanding of the developed NPs, e.g., drug loading/release, particle stability, and
Cédric G Jaffredo et al.
Macromolecular rapid communications, 33(22), 1938-1944 (2012-08-14)
Basic organocatalysts of the guanidine (1,5,7-triazabicyclo[4.4.0]dec-5-ene, TBD), amidine (1,8-diazabicyclo[5.4.0]-undec-7-ene, DBU), and phosphazene (2-tert-butylimino-2-diethylamino-1,3-dimethylperhydro-1,3,2diazaphosphorine, BEMP) type do effectively polymerize β-butyrolactone (BL). Poly(3-hydroxybutyrate)s (PHBs) with controlled molecular features, that is, controlled molar masses, narrow molar mass distributions, and well-defined functional end groups
Kristin E Price et al.
Organic letters, 11(9), 2003-2006 (2009-04-04)
A mild, high-yielding, and practical protocol for the direct amidation of alkyl cyanoacetates using DBU is presented. This method eliminates the need for activation of cyanoacetic acid and/or high temperatures. It has been applied to the large-scale synthesis of CP-690,550-10
Mikhail A Filatov et al.
Organic & biomolecular chemistry, 13(25), 6977-6983 (2015-05-30)
Fusion with a 9,10-anthraquinone moiety was achieved to extend porphyrin's π-system. A bridged dihydroisoindole derivative was used to prepare the corresponding meso-tetraphenyltetraanthraquinonoporphyrin (Ph4TAQP) via a thermal retro-Diels-Alder reaction. The basic optical properties of the prepared new anthraquinonoporphyrin and its complexes
Tetrahedron, 60, 4821-4827 (2004)
Synthesis of cellulose acetate propionate and cellulose acetate butyrate in a CO2/DBU/DMSO system.
Xu Q, et al.
Cellulose, 25(1), 205-216 (2018)
Xiuzhao Yu et al.
Chemical communications (Cambridge, England), 48(33), 4002-4004 (2012-03-17)
An efficient, metal free approach to highly substituted 2-pyrrolines by DBU-catalyzed tandem additions (a formal [3+2] cycloaddition) of electron-deficient 1,3-conjugated enynes and 2-aminomalonates under mild conditions was developed.
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