The Synthesis and Pyrolytic Rearrangement of Phthalate Esters of Some Tertiary Silanols. An Attempt to Prepare a Silicon Carbon Double Bond Species

1975 ◽  
Vol 53 (1) ◽  
pp. 67-70 ◽  
Author(s):  
K. G. Rutherford ◽  
R. J. Seidewand
Keyword(s):  
Double Bond ◽  
Carbon Atom ◽  
Phthalic Anhydride ◽  
Phthalate Esters ◽  
Optically Active ◽  
Asymmetric Carbon Atom ◽  
Silyl Ethers ◽  
Carbon Double Bond ◽  
Silicon Carbon ◽  
Asymmetric Carbon

The synthesis and pyrolysis of the methyl phthalate esters of diphenylmethylsilyl, t-butylsilyl, benzyldiphenylsilyl, and optically active 2-octanol yielded corresponding silyl ethers and phthalic anhydride. In the case of the latter compound, almost complete retention of configuration was observed about the asymmetric carbon atom. A mechanism is proposed for this rearrangement.

scholarly journals The symmetrical spiro -heptanediamine and its resolution into optically active components

1936 ◽  
Vol 154 (881) ◽  
pp. 53-60 ◽  
Keyword(s):  
Carbon Atom ◽  
Optical Activity ◽  
Optically Active ◽  
Active Components ◽  
Asymmetric Carbon Atom ◽  
Molecular Configuration ◽  
Experimental Realization ◽  
Asymmetric Carbon ◽  
Acetic Acids

The experimental realization of the simplest possible types of molecular configuration which can show optical activity in the amorphous con­dition is important in connexion with stereochemical theory. Among optically active spiranes containing no asymmetric carbon atom such simple types are found in the d - and l -1-methyl- cyclo -hexylidene-4-acetic acids and the d - and 1-spiro- 5:5-dihydantoins, but no satisfactory case has hitherto been described of optical activity in substances of the constitution H —C—( CH 2 ) n —C—(CH 2 ) n —X X —C—( CH 2 ) n —C—(CH 2 ) n —H. One of the simplest conceivable examples of the latter kind should be found in the previously unknown symmetrical spiro -heptanediamine of the constitution— NH 2 —C—CH 2 —C—CH 2 —C—H H—C—CH 2 —C—CH 2 —C—NH 2 .

Bi-Functional Magnetical Chiral Ionic Liquids Derived from Imidazolium and Pyridinium

2012 ◽  
Vol 161 ◽  
pp. 128-133
Author(s):  
Li Wei Qian ◽  
Xiao Ling Hu ◽  
Ping Guan ◽  
Xiao Qing Guo
Keyword(s):  
Ionic Liquids ◽  
Carbon Atom ◽  
Pyridine Ring ◽  
Imidazole Ring ◽  
Optically Active ◽  
Asymmetric Carbon Atom ◽  
Chiral Ionic Liquids ◽  
New Class ◽  
Asymmetric Carbon ◽  
Positively Charged

Novel Bi-Functional Magnetical Chiral Ionic Liquids (MCILs) Derived from Imidazolium and Pyridinium Were Synthesized via Simply Two Step Reactions. Optically Active Ionic Liquids Have an Asymmetric Carbon Atom Linked to the Positively Charged Imidazole Ring or Pyridine Ring, while the Magnetical Anion Contains Tetrachloroferrate (FeCl4-), their Properties of Chirality and Magnetism Were Characterized. the Structure of MCILs Would Promise a New Class of Bi-Functional Ionic Liquids.

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