Occurrence and Origin of the Tropylium Ion in the Mass Spectra of Arylboronic Acid Esters

1971 ◽  
Vol 49 (10) ◽  
pp. 1766-1770 ◽  
Author(s):  
R. J. Bose ◽  
M. D. Peters
Keyword(s):  
Mass Spectra ◽  
Phenylboronic Acid ◽  
Arylboronic Acid ◽  
Acid Esters

The mass spectra of a number of phenylboronic acid esters of 1,2- and 1,3-diols are examined and the presence and origin of the tropylium rearrangement ion is established.

Boronic esters of a porphyrazine and its precursor

2011 ◽  
Vol 15 (07n08) ◽  
pp. 742-747 ◽  
Author(s):  
Şükran Cenikli Başeren ◽  
Şennur Özçelik ◽  
Ahmet Gül
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Molecular Sieve ◽  
Mass Spectra ◽  
Phenylboronic Acid ◽  
Proton Nuclear Magnetic Resonance ◽  
Reduced Pressure ◽  
Boronic Esters ◽  
Acid Esters ◽  
Nuclear Magnetic

Phenylboronic acid esters of an unsaturated precursor 1,2-dicyano-1,2-bis(2-hydroxy- ethylthio)ethylene and the magnesium porphyrazine derived from it have been prepared either by refluxing a mixture of the reagents in chloroform in the presence of molecular sieve or by solvent-free heating in an oven under reduced pressure. The two novel compounds have been characterized by elemental analysis together with ultraviolet-visible, infrared spectroscopy, proton nuclear magnetic resonance, carbon-13 nuclear magnetic resonance, boron-11 nuclear magnetic resonance, and mass spectra.

Mass spectra of some dithiocarboxylic acid esters

1972 ◽  
Vol 6 (4) ◽  
pp. 407-413 ◽  
Author(s):  
N. H. Leon
Keyword(s):  
Mass Spectra ◽  
Acid Esters

Mass spectra of α-aminooxy acid esters and their acetyl derivatives

1984 ◽  
Vol 11 (5) ◽  
pp. 230-235 ◽  
Author(s):  
Z. Warnke ◽  
J. Szàfranek ◽  
A. Wiśniewski ◽  
Cz. Trojanowska
Keyword(s):  
Mass Spectra ◽  
Acid Esters

scholarly journals Modified Conditions for Copper-catalyzed ipso-Thiolation of Arylboronic Acid Esters with Thiosulfonates

2018 ◽  
Vol 47 (1) ◽  
pp. 85-88 ◽  
Author(s):  
Kazuya Kanemoto ◽  
Suguru Yoshida ◽  
Takamitsu Hosoya
Keyword(s):  
Arylboronic Acid ◽  
Acid Esters

Synthesis of phenolic esters with potential long-lasting insect-repellent properties

1968 ◽  
Vol 46 (17) ◽  
pp. 2835-2842 ◽  
Author(s):  
Ronald P. Quintana ◽  
Lorrin R. Garson ◽  
Andrew Lasslo
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Mass Spectra ◽  
Acid Catalysis ◽  
Repellent Activity ◽  
Insect Repellent ◽  
Undecanoic Acid ◽  
Phenolic Esters ◽  
Acid Esters ◽  
Nuclear Magnetic

The synthesis of undecanoic acid esters of resorcinol, 4-chlororesorcinol, hexachlorophene, o-chlorophenol, and p-chlorophenol is described. The compounds were designed to provide, potentially, perdurable insect-repellent activity. When the synthesis of esters of resorcinol and 4-chlororesorcinol was attempted with undecanoic acid, under acid catalysis, principally ketones and ketoesters were isolated. The originally sought esters were obtained, however, by the reaction of the phenols with undecanoyl chloride in the presence of pyridine. The infrared, nuclear magnetic resonance, and mass spectra of the compounds are discussed.

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