New active and selective catalysts for homogeneous metathesis of disubstituted alkynes
β Scribed by A. Bencheick; M. Petit; A. Mortreux; F. Petit
- Publisher
- Elsevier Science
- Year
- 1982
- Weight
- 515 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0304-5102
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π SIMILAR VOLUMES
ZirconiumUV) complexes of 5,10, 15, 204etraphenylporphyrin ((TPP)Zr%) catalyze highly regio-and stereo-selective ethylalumination of terminal alkynes with satisfactorily high turnover numbers.
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The W(O-2,6-C 6 H 3 X 2 ) 2 Cl 4 /Bu 4 Sn catalytic systems (X Ph, F, Cl, Br) have a high activity for the metathesis of terminal alkenes and a high selectivity towards primary metathesis products. Tungsten(VI) alkoxide complexes are not nearly as active as the tungsten(VI) aryloxide complexes. BrΛn