- Nickel(0) induzierte und katalysierte CC-Verknuepfungen von Styrol mit α, ο-Diisocyanaten
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The reaction of 1,6-Hexamethylenediisocyanate with styrene at the (lig)Ni0 system (lig=TCP) is dependent on the molar ratio to either the mono- or the bisazanickela 5-rings.Under certain conditions the normally stoichiometric reaction changes into one which is catalytic.In a regioselective C-C coupling reaction N,N'-(hexanediyl)biscinnamic amide is formed after about 7 catalytic cycles.Spectroscopic and chemical methods were used to identify the structures.Some special features of the C-C coupling reactions and the mechanism of the catalysis are described.
- Hoberg, Heinz,Hernandez, Elisa,Guhl, Dieter
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- Environmentally benign decarboxylative: N-, O-, and S-Acetylations and acylations
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An operationally simple and general method for acetylation and acylation of a wide variety of substrates (amines, alcohols, phenols, thiols, and hydrazones) has been reported. Meldrum's acid and its derivatives have been used as an air-stable, non-volatile, cost-effective, and easy to handle acetylating/acylating agent. Easily separable byproducts (CO2 and acetone) allowed the isolation of analytically pure acetylated products without the requirement of work-up and any chromatography. This journal is
- Ghosh, Santanu,Purkait, Anisha,Jana, Chandan K.
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supporting information
p. 8721 - 8727
(2020/12/30)
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