scholarly journals Regioselective O/C phosphorylation of α-chloroketones: a general method for the synthesis of enol phosphates and β-ketophosphonates via Perkow/Arbuzov reaction

RSC Advances ◽  
2020 ◽  
Vol 10 (49) ◽  
pp. 29493-29497
Author(s):  
Yuepeng Cao ◽  
Zhenhua Gao ◽  
Junchen Li ◽  
Xiaojing Bi ◽  
Ling Yuan ◽  
...  
Keyword(s):  
Arbuzov Reaction ◽  
Trialkyl Phosphites ◽  
General Method

A highly regioselective O/C phosphorylation of α-chloroketones with trialkyl phosphites was developed in the preparation of enol phosphates and β-ketophosphonates.

Visible-Light Photo-Arbuzov Reaction of Aryl Bromides and Trialkyl Phosphites Yielding Aryl Phosphonates

ACS Catalysis ◽  
2016 ◽  
Vol 6 (12) ◽  
pp. 8410-8414 ◽  
Author(s):  
Rizwan S. Shaikh ◽  
Simon J. S. Düsel ◽  
Burkhard König
Keyword(s):  
Visible Light ◽  
Arbuzov Reaction ◽  
Aryl Bromides ◽  
Trialkyl Phosphites

A novel ring closure in the Michaelis–Arbuzov reaction of trialkyl phosphites with phthaloyl chloride

1967 ◽  
Vol 0 (20) ◽  
pp. 1060-1061 ◽  
Author(s):  
K. Darrell Berlin ◽  
Donald H. Burpo ◽  
Roland U. Pagilagan ◽  
Duane Bude
Keyword(s):  
Ring Closure ◽  
Arbuzov Reaction ◽  
Trialkyl Phosphites

Use of 5-deoxy-ribo-hexofuranose derivatives for the preparation of 5'-nucleotide phosphonates and homoribonucleosides

1989 ◽  
Vol 54 (4) ◽  
pp. 1055-1066 ◽  
Author(s):  
Sergei N. Mikhailov ◽  
Nelly Sh. Padyukova ◽  
Marat Ya. Karpeiskii ◽  
Lidiya I. Kolobushkina ◽  
Leon N. Beigelman
Keyword(s):  
Triethyl Phosphite ◽  
Arbuzov Reaction ◽  
Trimethylsilyl Derivatives ◽  
The Arbuzov Reaction ◽  
General Method

A convenient and general method is proposed for the synthesis of 5'-nucleotide phosphonate analogs starting from 5-deoxy-1,2-O-isopropylidene-α-D-xylo-hexofuranose which can easily be produced in preparative quantities from D-glucose. Phosphonate IIIe was synthesized by means of the Arbuzov reaction between 3-O-benzoyl-6-bromo-5,6-dideoxy-1,2-O-isopropylidene-α-D-ribo-hexofuranose and triethyl phosphite. The consecutive acetolysis, condensation with uracil and N6-benzoyladenine bis-trimethylsilyl derivatives and deblocking possessed phosphonate analogs of 5'-nucleotides in good yields. The intermediate 5-deoxy-1,2-O-isopropylidene-α-D-ribo-hexofuranose derivatives were used for the preparation of homonucleosides.

A General Method for Spectrometer Design in the Scoff Approximation

1976 ◽  
Vol 34 ◽  
pp. 538-539
Author(s):  
J. R. Fields
Keyword(s):  
Electron Microscope ◽  
Transmission Electron Microscope ◽  
Energy Analysis ◽  
Incident Beam ◽  
Scanning Transmission Electron Microscope ◽  
Chemical Identification ◽  
Scanning Transmission Electron ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
General Method

The energy analysis of electrons scattered by a specimen in a scanning transmission electron microscope can improve contrast as well as aid in chemical identification. In so far as energy analysis is useful, one would like to be able to design a spectrometer which is tailored to his particular needs. In our own case, we require a spectrometer which will accept a parallel incident beam and which will focus the electrons in both the median and perpendicular planes. In addition, since we intend to follow the spectrometer by a detector array rather than a single energy selecting slit, we need as great a dispersion as possible. Therefore, we would like to follow our spectrometer by a magnifying lens. Consequently, the line along which electrons of varying energy are dispersed must be normal to the direction of the central ray at the spectrometer exit.

Phase behavior of cationic and anionic surfactants at low concentrations

1992 ◽  
Vol 50 (1) ◽  
pp. 694-695
Author(s):  
E. Naranjo
Keyword(s):  
Phase Behavior ◽  
Structural Characterization ◽  
Dynamic Systems ◽  
Anionic Surfactants ◽  
Intermolecular Forces ◽  
Stable Form ◽  
Surfactant Mixtures ◽  
Low Concentrations ◽  
Cationic And Anionic Surfactants ◽  
General Method

Equilibrium vesicles, those which are the stable form of aggregation and form spontaneously on mixing surfactant with water, have never been demonstrated in single component bilayers and only rarely in lipid or surfactant mixtures. Designing a simple and general method for producing spontaneous and stable vesicles depends on a better understanding of the thermodynamics of aggregation, the interplay of intermolecular forces in surfactants, and an efficient way of doing structural characterization in dynamic systems.

Caricaturing as a general method to improve poor face recognition: Evidence from low-resolution images, other-race faces, and older adults.

2019 ◽  
Vol 25 (2) ◽  
pp. 256-279 ◽  
Author(s):  
Amy Dawel ◽  
Tsz Ying Wong ◽  
Jodie McMorrow ◽  
Callin Ivanovici ◽  
Xuming He ◽  
...  
Keyword(s):  
Older Adults ◽  
Face Recognition ◽  
Low Resolution ◽  
General Method ◽  
Low Resolution Images
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