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Generation and trapping reaction of an efficient 1,2-dehydrocarborane precursor, phenyl[0-(trimethylsilyl)carboranyl]iodonium acetate
An efficient 1,2-dehydrocarborane precursor, phenyl[o-(trimethylsilyl)carboranyl]iodonium acetate 4, was readily prepared by reaction of [o-(trimethylsilyl)carboranyl]lithium and IPh(OAc)2. The facile 2+4 cycloaddition of 4 with dienes such as anthracene, naphthalene, norborna-2,5-diene and 2,5-dimethylfuran gave high yields of the 1,2-dehydrocarborane adducts in the presence of a desilylating agent. The reaction of 4 with a cyclic alkene and strained cycloalkynes afforded the adducts formed by the ene reaction and the 2+2 cycloaddition reaction. The reaction of 2 with a bicyclopalladacycle yielded the cyclization product. The structures ofcompounds 5 and 7 were determined by single-crystal X-ray crystallograp hy.
Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.Recommanded Product: Tris(dibenzylideneacetone)dipalladium-chloroform, you can also check out more blogs about52522-40-4
Reference£º
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method