| Autor: |
Gololobov, Yu., Galkina, M., Dovgan', O., Guseva, T., Kuzmintseva, I., Senchenya, N., Petrovskii, P. |
| Zdroj: |
Russian Chemical Bulletin; Sep1999, Vol. 48 Issue 9, p1622-1627, 6p |
| Abstrakt: |
A new type of intramolecular electrophilic rearrangements involving the shift of COOAlk groups from carbon to an N-anionic center is considered. Carbanionic species with COOAlk groups at anionic centers containing no acidic hydrogen react unusually with alkyl(aryl) iso(thio)cyanates giving carbamates as a result of insertion of RNCX into the C−C bond. The kinetics and mechanism of insertion of aryl isocyanates into the C−C bond of the phosphonium zwitterion obtained from triisopropylphosphine and ethyl 2-cyanoacrylate are discussed. The reaction of α-carbanions derived from N,N-disubstituted amides with methyl trifluoromethanesulfonate results in O-methylation. Some possibilities of back N→C− migrations are considered. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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