ChemInform Abstract: REGIOSPECIFIC SYNTHESIS OF DISUBSTITUTED BENZENE DERIVATIVES

1979 ◽  
Vol 10 (35) ◽  
Author(s):  
G. FELIX ◽  
J. DUNOGUES ◽  
R. CALAS
Keyword(s):  
Benzene Derivatives ◽  
Disubstituted Benzene

Coefficients of molecular homeomorphism and crystalline isomorphism in the series of para-disubstituted benzene derivatives

1991 ◽  
Vol 88 ◽  
pp. 509-514 ◽  
Author(s):  
MA Cuevas Diarte ◽  
T Calvet ◽  
M Labrador ◽  
E Estop ◽  
HAJ Oonk ◽  
...  
Keyword(s):  
Benzene Derivatives ◽  
Disubstituted Benzene

scholarly journals Macrocyclization Using RCM Reactions. Synthesis of Simple Metacyclophanes and Synthetic Efforts toward Platycarynol, a 15-Membered Aromatic Ether

2016 ◽  
Vol 11 (8) ◽  
pp. 1934578X1601100
Author(s):  
Katsuyuki Nakashima ◽  
Hatsuna Matsunaga ◽  
Masako Ito ◽  
Hiroshi Minami ◽  
Akihito Aiba ◽  
...  
Keyword(s):  
Ground State ◽  
Diphenyl Ether ◽  
Benzene Derivatives ◽  
Disubstituted Benzene ◽  
Aromatic Ether

Preparation of 13- to 19-membered carbocycles (metacyclophanes) from 1,3-disubstituted benzene derivatives has been successfully carried out using the RCM reaction, but similar starting materials having diphenyl ether did not cyclize to 15-membered compounds, whose ground state conformations were calculated and discussed. Several attempts to cyclize to form platycarynol are described.

Ring openings of γ- and δ-lactones to form γ- and δ-hydroxyamides. Cyclodehydration. Mass spectra of δ-hydroxyamides

1969 ◽  
Vol 47 (19) ◽  
pp. 3671-3676 ◽  
Author(s):  
Earl M. Levi ◽  
Chung-Ling Mao ◽  
Charles R. Hauser
Keyword(s):  
Mass Spectrometry ◽  
Sulfuric Acid ◽  
Mass Spectra ◽  
Benzene Derivatives ◽  
Ortho Effect ◽  
Disubstituted Benzene

Ring openings of γ- and δ-lactones were effected with potassium amide or hydrazine to form γ- and δ-hydroxyamides, which were cyclodehydrated with sulfuric acid to give γ- and δ-lactams, respectively. These products are, respectively, phthalimidines and 3,4-dihydroisocarbostyrils having no substituent on nitrogen or having the N—NH2 group. The possible linear dehydration of the δ-hydroxyamides was not observed. The δ-hydroxyamides exhibited, on mass spectrometry, a type of carbon–carbon cleavage that has apparently not been reported for ordinary alcohols. An example of the "ortho effect" in mass spectra of o-disubstituted benzene derivatives is also discussed.

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