Fluorenylidenephosphines having a 2,4-di-t-butyl-6-methoxyphenyl, 2,4-di-t-butyl-6-(methoxymethyl)phenyl or 2,4-dit-butyl-6-(phenoxymethyl)phenyl group were prepared. 31 P NMR chemical shifts of the fluorenylidenephosphines indicated that electron-donating effects through space are not so strong bet
Preparation and reaction of sterically crowded N-(2,4-di-t-butylphenyl)-N-methylaminodichlorophosphine
✍ Scribed by François Rivière; Shigekazu Ito; Masaaki Yoshifuji
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- French
- Weight
- 102 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
One of the o-t-butyl groups was eliminated from 2,4,6-tri-t-butyl-N-methylaniline by reaction with phosphorus trichloride in DME to afford sterically crowded N-(2,4-di-t-butylphenyl)-N-methylaminodichlorophosphine, which was utilized for preparation of a novel unsymmetrical diphosphene.
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