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Showing 1 to 7 of 7 entries
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(Eta2-alkyne)methyl(dioxo)rhenium complexes as aldehyde-olefination catalysts.

Journal of the American Chemical Society

Santos AM, Romão CC, Kühn FE.
PMID: 12603128
J Am Chem Soc. 2003 Mar 05;125(9):2414-5. doi: 10.1021/ja021315c.

Complexes CH3ReO2L (L = 2-butyne, 3-hexyne, diphenylacetylene) are catalysts for the olefination of aldehydes, using 4-nitrobenzaldehyde (4-nba) as the standard aldehyde and ethyldiazoacetate (eda) as the diazo compound. Spectroscopic studies including in situ 31P, 17O, 13C, and 1H NMR...

A Polymer-Supported Phosphazine as a Stable and Practical Reagent in the Three-Component Synthesis of Substituted (Cyclopentadienyl)tricarbonylrhenium Complexes.

Angewandte Chemie (International ed. in English)

Minutolo F, Katzenellenbogen JA.
PMID: 29710984
Angew Chem Int Ed Engl. 1999 Jun 01;38(11):1617-1620. doi: 10.1002/(SICI)1521-3773(19990601)38:11<1617::AID-ANIE1617>3.0.CO;2-Z.

A very stable heterogenized difunctional cyclopentadienyl-ring precursor, storable under ambient conditions, readily participates in the simultaneous formation of a η

Oxorhenium complexes as aldehyde-olefination catalysts.

Chemistry (Weinheim an der Bergstrasse, Germany)

Santos AM, Pedro FM, Yogalekar AA, Lucas IS, Romão CC, Kühn FE.
PMID: 15526317
Chemistry. 2004 Dec 03;10(24):6313-21. doi: 10.1002/chem.200400296.

Several oxorhenium compounds in the formal oxidation states V and VII are examined as catalysts for the aldehyde-olefination starting from diazo compounds, phosphines, and aldehydes. Of these, [ReMeO2(eta2-alkyne)] complexes provide the simplest catalysts to study, although [ReOCl3(PPh3)2] still remains...

Ultramark 1621 as a reference compound for positive and negative ion fast-atom bombardment high-resolution mass spectrometry.

Journal of the American Society for Mass Spectrometry

Jiang L, Moini M.
PMID: 24234707
J Am Soc Mass Spectrom. 1992 Nov;3(8):842-6. doi: 10.1016/1044-0305(92)80007-8.

Ultramark 1621, a commercially available mixture of fluorinated phosphazines, was found to be a useful calibration compound for negative and positive ion fast-atom bombardment (FAB) high-resolution mass spectrometry. Ultramark 1621 worked very well with the most widely used matrices...

N-Phosphino- and N-Phosphonionitrilimines: From Nucleophilic to Electrophilic 1,3-Dipoles.

The Journal of organic chemistry

Palacios F, Pagalday J, Piquet V, Dahan F, Baceiredo A, Bertrand G.
PMID: 11671401
J Org Chem. 1997 Jan 24;62(2):292-296. doi: 10.1021/jo961443h.

N-[Bis(diisopropylamino)phosphino]-C-[bis(diisopropylamino)thioxophosphoranyl]nitrilimine (1) reacts with electron-poor dipolarophiles such as maleimide, methyl vinyl ketone, and 1,4-naphthoquinone via HOMO(dipole)-controlled [2+3] cycloadditions, while N-[bis(diisopropylamino)(methyl)phosphonio]-C-[bis(diisopropylamino)thioxophosphoranyl]nitrilimine (2a) reacts with electron-rich dipolarophiles such as norbornadiene and ethyl trans-pyrrolineacrylate via LUMO(dipole)-controlled [2+3] cycloadditions. Carbon disulfide reacts with...

Interaction between chemical mutagens with a delayed effect and metabolites of seeds : Communication 2: changes in mutagenic activity.

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik

Shevchenko VV, Protopopova EM, Grigoriyeva GA, Bolotova TK.
PMID: 24430019
Theor Appl Genet. 1971 Jan;41(2):52-6. doi: 10.1007/BF00277045.

A study was made of chromosome aberrations in Crepis capillaris seedlings, induced by the reaction products of chemical mutagens with seed metabolites. Interaction between ethylenimine and seed metabolites of some plants of the family Compositae (C. capillaris, Taraxacum officinale,...

Electrohydrodynamics of Gas-Assisted Electrospray Ionization Mass Spectrometry.

Journal of the American Society for Mass Spectrometry

Lee JY, Kottke PA, Fedorov AG.
PMID: 32869991
J Am Soc Mass Spectrom. 2020 Oct 07;31(10):2073-2085. doi: 10.1021/jasms.0c00197. Epub 2020 Sep 17.

Gas-flow assistance is commonly used in ESI-MS for improved transport and desolvation, and fundamental understanding of the underlying phenomena is essential for improvement of aerodynamic interfaces that couple ESI sources and MS. For this purpose, an electrohydrodynamic model is...

Showing 1 to 7 of 7 entries