## Abstract The effect on electrophilic activity of substituents located __para__, __ortho__, and __meta__ to the nitro group of nitrobenzenes was determined by using vicarious nucleophilic substitution of hydrogen (VNS) with the carbanion of chloromethyl phenyl sulfone (**1**) as the model process
Stereochemistry in the reaction of alkylsulfinyl phenylmethyl carbanion with electrophiles
β Scribed by Masato Higaki; Mutsuo Goto; Atsuyoshi Ohno
- Publisher
- John Wiley and Sons
- Year
- 1990
- Tongue
- English
- Weight
- 413 KB
- Volume
- 1
- Category
- Article
- ISSN
- 1042-7163
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β¦ Synopsis
Stereochemistry of the reactions of methyl-, ethyl-, 2propyl-, and 1 ,I -dimethylethylsulfinyl phenylmethyl carbanions with deuterium oxide and methyl iodide in tetrahydro furan have been studied. The 2-propylsulfinyl phenylmethyl carbanion exerts abnormal behavior in the sense that the alkyl substituent herein has no ability to freeze the conformation of the carbanion. The results are interpreted i n terms of hard and soft interactions. 'Li and "0 nuclear magnetic resonance ( N M R ) spectroscopy revealed that the carbanions derived from these sulfoxides behave as the oxylate form.
π SIMILAR VOLUMES
It fs shown that the reactfvfty towards electrophftes of dfastereomerfc Sckfff bases of \*R and \*S vatfne, leucfne, phenylalanfne and norvalfne methyl esters wfth (lS,ZS,SS) or (lR,2R,SR) 2-hydroxy 3-pfnanone, is hfghly dependent on the stereochemistry of the startfng product.