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Yoshinori Takahashi et al.
Dalton transactions (Cambridge, England : 2003), (27)(27), 3546-3552 (2008-07-03)
Reaction of [Cp*Ir(micro-H)](2) (5) (Cp* = eta(5)-C(5)Me(5)) with bis(dimethylphosphino)methane (dmpm) gives a new neutral diiridium complex [(Cp*Ir)(2)(micro-dmpm)(micro-H)(2)] (3). Treatment of 3 with methyl triflate at -30 degrees C results in the formation of [(Cp*Ir)(H)(micro-dmpm)(micro-H)(Me)(IrCp*)][OTf] (6). Warming a solution of above
Kazunori Kawamura et al.
Annals of nuclear medicine, 18(2), 165-168 (2004-06-16)
Recently we have clinically used three new radioligands, [11C]SA4503, [11C]MPDX, and [11C]TMSX, for mapping sigma1, adenosine A1, and adenosine A2A receptors, respectively, in the human brain by positron emission tomography. These radioligands are synthesized by methylation of the respective demethyl
J Passchier et al.
Synapse (New York, N.Y.), 64(7), 542-549 (2010-03-03)
The type-1 glycine transporter (GlyT1) is an important target for the development of new medications for schizophrenia. A specific and selective positron emission tomography (PET) GlyT1 ligand would facilitate drug development studies to determine whether a drug reaches this target
Yongsheng Hu et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 61(3), 403-411 (2004-12-08)
A molten salt electrolyte composed of lithium triflate (LiCF3SO3) and acetamide (CH3CONH2) has been prepared and characterized by Raman, IR spectroscopy and ac impedance. It is found that acetamide molecule not only complexes with the Li+ cation but also interacts
Junling Li et al.
Nuclear medicine and biology, 42(3), 283-291 (2014-12-30)
Bis(Zn-dipicolylamine (Zn-DPA)) coordination complexes represent a new class of synthetic small molecules that can target anionic phosphatidylserine (PS) in the apoptotic cells with high affinity and specificity. In this study, we labeled Zn-DPA and Cy7-Zn-DPA with different (18)F-prosthetic groups and
Q H Zheng et al.
Nuclear medicine and biology, 23(8), 981-986 (1996-11-01)
The important radiotracer precursor 2 beta-carbomethoxy-3 beta-(4-idophenyl)-tropane (beta-CIT, RTI-55) was made in 52% overall yield from cocaine. Key steps were improved conjugate Grignard addition to anhydroecgonine methyl ester with > 3.5:1 2 beta: 2 alpha-isomer selectivity, and a mild new
K Pan et al.
Biochemistry, 37(5), 1357-1364 (1998-03-07)
D,L-S(6,8)-Methyllipoic acid methyl ester triflate salt (D,L-S-methyllipoic acid methyl ester) was synthesized as a model for S-protonated lipoic acid, suggested to be the active form of lipoic acid in the reductive acylation catalyzed by the E1 and E2 enzymes of
Convenient gas phase bromination of [11C]methane and production of [11C]methyl triflate.
B H Mock et al.
Nuclear medicine and biology, 26(4), 467-471 (1999-06-26)
David Vállez Garcia et al.
PloS one, 10(3), e0122363-e0122363 (2015-03-31)
High-resolution anatomical image data in preclinical brain PET and SPECT studies is often not available, and inter-modality spatial normalization to an MRI brain template is frequently performed. However, this procedure can be challenging for tracers where substantial anatomical structures present
Comparison of [11C]methyl triflate and [11C]methyl iodide in the synthesis of PET radioligands such as [11C]beta-CIT and [11C]beta-CFT.
K Någren et al.
Nuclear medicine and biology, 22(8), 965-979 (1995-11-01)
S E Snyder et al.
Nuclear medicine and biology, 25(8), 751-754 (1998-12-24)
Synthesis of 1-[11C]methylpiperidin-4-yl propionate ([11C]PMP), an in vivo substrate for acetylcholinesterase, is reported. An improved preparation of 4-piperidinyl propionate (PHP), the immediate precursor for radiolabeling, was accomplished in three steps from 4-hydroxypiperidine by (a) protection of the amine as the
T D Wegman et al.
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine, 57(4), 505-507 (2002-10-04)
This paper describes an improved preparation of [11C]verapamil by reaction of [11C]methyl triflate with desmethylverapamil. The optimal reaction temperature, amount of precursor and reaction time were assessed. With this method [11C]verapamil can be prepared with a reproducible radiochemical yield of
F Wuest et al.
Ernst Schering Research Foundation workshop, (62)(62), 183-213 (2006-12-19)
Radiochemistry with the short-lived positron emitter 11C (half-life 20.38 min) represents special challenges in terms of synthesis time and labeling techniques. The recent developments in 11C radiochemistry have steadily expanded the number of 11C labeled compounds. This chapter addresses selected
R Iwata et al.
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine, 55(1), 17-22 (2001-05-08)
A simple automated preparation of [11C]raclopride by reaction of [11C]methyl triflate with demethylraclopride triflate is described. The conventional bubbling of [11C]methyl triflate into the precursor solution was compared with two alternative methods which used a commercially available C18 cartridge (on-column
K Någren et al.
Nuclear medicine and biology, 22(2), 235-239 (1995-02-01)
[11C]Methyl triflate was compared with [11C]methyl iodide as a labelled precursor in the synthesis of some commonly used PET radioligands, L-[11C]deprenyl, [11C]m-hydroxyephedrine (MHED), [11C] beta-CIT, [11C] beta-CFT and [11C]SCH 39166 which have been prepared previously in comparatively low yields from
Matthew C Mackenzie et al.
Biomacromolecules, 16(1), 236-245 (2014-12-18)
The field of RNA interference depends on the development of safe and efficient carriers for short interfering ribonucleic acid (siRNA) delivery. Conventional cationic monomers for siRNA delivery have utilized the nitrogen heteroatom to produce cationic charges. Here, we polymerized cationic
C Thominiaux et al.
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine, 64(5), 570-573 (2006-01-24)
Recently, the pyrazolopyrimidine, [11C] N,N-Diethyl-2-[2-(4-methoxyphenyl)-5,7-dimethylpyrazolo[1,5-a]pyrimidin-3-yl]acetamide (DPA-713) has been reported as a new promising marker for the study of peripheral benzodiazepine receptors with positron emission tomography. In the present study, DPA-713 has been labelled from the corresponding nor-analogue using [11C]methyl triflate
P H Seeberger et al.
Enantiomer, 1(4-6), 311-323 (1996-01-01)
The "core" pentasaccharide region of high mannose asparagine-linked glycoproteins was synthesized using thioethyl donors and methyl triflate to promote coupling. All monosaccharide units were prepared from glycals. The central mannose residue was installed by inversion of the C2 hydroxyl of
D M Jewett
International journal of radiation applications and instrumentation. Part A, Applied radiation and isotopes, 43(11), 1383-1385 (1992-11-01)
[11C]Methyl triflate ([11C]methyl trifluoromethanesulfonate) was formed in high yield when [11C]methyl iodide in a nitrogen carrier was passed at 200 degrees C through a column containing graphitized carbon impregnated with 50% by weight of silver triflate.
[Three cases of occupational methyl trifluoromethanesulfonate poisoning].
Xue-Tao Zhang et al.
Zhonghua lao dong wei sheng zhi ye bing za zhi = Zhonghua laodong weisheng zhiyebing zazhi = Chinese journal of industrial hygiene and occupational diseases, 28(4), 304-304 (2010-05-15)
Protection of Alcohols Using 2-Benzyloxy-1-Methylpyridinium Trifluoromethanesulfonate: Methyl (R)-(-)-3-Benzyloxy-2-Methyl Propanote.
Poon, Kevin WC, Philip A. Albiniak, and Gregory B. Dudley.
Organic Syntheses, 295-305 (2007)
W. L. F. Armarego, Christina Li Lin Chai
Purification of Laboratory Chemicals, 189-189 (2013)
Synthesis, structure, and reactivity of a stabilized phosphiranylium salt.
Helen Jansen et al.
Angewandte Chemie (International ed. in English), 49(32), 5485-5488 (2010-07-06)
Liang Liao et al.
The Journal of organic chemistry, 70(16), 6265-6273 (2005-07-30)
Glycosylation of a disaccharide containing N-acetylglucosamine with rhamnosyl and mannosyl trichloracetimidates under triethysilyl triflate catalysis led to the competitive formation of glycosyl imidates. While the rhamnosyl imidate could be rearranged to the thermodynamically favored trisaccharide, the mannosyl analogue was resistant
Sylwia Ptasińska et al.
The Journal of chemical physics, 135(21), 214309-214309 (2011-12-14)
Gas phase studies of dissociative electron attachment to simple alkyl (CF(3)SO(3)CH(3)) and aryl (C(6)H(5)SO(3)CF(3) and CF(3)SO(3)C(6)H(4)CH(3)) triflates, model molecules of nonionic photoacid generators for modern lithographic applications, were performed. The fragmentation pathways under electron impact below 10 eV were identified
Vanessa Gómez-Vallejo et al.
Nuclear medicine communications, 32(11), 1011-1017 (2011-09-08)
The use of ¹¹C-labeled radiotracers in routine positron emission tomography studies is dependent on the production capability of radiochemistry laboratories. Therefore, considerable efforts are being focused on the development of fast, efficient, and robust methods for the preparation of such
Jonathan T Reeves et al.
Organic letters, 12(19), 4388-4391 (2010-09-04)
Aryltrimethylammonium triflates and tetrafluoroborates were found to be highly reactive electrophiles in the Pd-catalyzed cross coupling with aryl Grignard reagents. The coupling reactions proceed at ambient temperature with a nearly stoichiometric quantity of Grignard reagent, and diverse functionality is tolerated.
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