Orientation of electrophilic meso-substitution in metallooctaethylporphyrins
✍ Scribed by E. Watanabe; S. Nishimura; H. Ogoshi; Z. Yoshida
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- French
- Weight
- 603 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0040-4020
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## Abstract The mono‐nitrated __meso__‐tetraphenylporphyrin (TPP) complex **2** could be readily functionalized on the substituted pyrrole ring with yields of up to 83%. These transformations were achieved __via__ aromatic substitution with carbanions generated from diverse functionalized compounds
THE metal halide-catalyzed disproportionation of substituted tetraalkyl-2 RSi(CH3)3 A12Br6+ Si(CH3)4 + R2Si(CH3)2 silanes is considered to involve electrophilic substitution on carbon and nucleophilic substitution on silicon. 2 The transition state is pictured as: We have measured the initial rate
**Elektrophile Substitution in Azafluorenonsystemen ‐ Bromierung von Azafluorenonen** Die Bromierung von 1‐ und 4‐Aza‐ und 1,5‐, 1,8‐ und 4,5‐Diazafluorenonen **1–5** mit N‐Bromsuccinimid, Brom in Schwefelsäure oder mit Brom 60proz. Oleum wurde als Modellreaktion für die elektrophile Substitution i