The Ni-Mediated Cyclocarbonylation of Allyl Halides and Alkynes Made Catalytic. Evidence Supporting the Involvement of Pseudoradical NiI Species in the Mechanism
摘要:
We report here on a highly efficient catalytic method to synthesize intermolecularly the cyclopentane skeleton from starting products as simple as allyl halides, alkynes, and carbon monoxide under very mild reaction conditions by means of a substoichiometric amount of iron, acetone, and a catalytic amount of Ni(II) iodide.
Versatile chemoselectivity in Ni-catalyzed multiple bond carbonylations and cyclocarbonylations in CO2-expanded liquids
作者:Daniel del Moral、Anna M. Banet Osuna、Alba Córdoba、Josep M. Moretó、Jaume Veciana、Susagna Ricart、Nora Ventosa
DOI:10.1039/b908253k
日期:——
Selective mono or double carbonylations could be achieved by using CO2-expanded liquids in [2 + 2 + 1] carbonylative reactions of alkenes or acetylenes with allyl bromides catalyzed by Ni(I).
The Ni-Mediated Cyclocarbonylation of Allyl Halides and Alkynes Made Catalytic. Evidence Supporting the Involvement of Pseudoradical Ni<sup>I</sup> Species in the Mechanism
作者:M. Lluïsa Nadal、Julia Bosch、Josep M. Vila、Günter Klein、Susagna Ricart、Josep M. Moretó
DOI:10.1021/ja0525713
日期:2005.8.1
We report here on a highly efficient catalytic method to synthesize intermolecularly the cyclopentane skeleton from starting products as simple as allyl halides, alkynes, and carbon monoxide under very mild reaction conditions by means of a substoichiometric amount of iron, acetone, and a catalytic amount of Ni(II) iodide.
The Nickel-Catalyzed Carbonylative Cycloaddition of Allyl Halides and Acetylenes: An Efficient Tool for Cyclopentane Annelation
作者:Daniel del Moral、Susagna Ricart、Josep M. Moretó
DOI:10.1002/chem.200903273
日期:——
From a practical synthetic point of view, the nickel‐mediated carbonylativecycloaddition of alkynes and allyl halides is a straightforward method for obtaining the cyclopentane skeleton in high yields and with controlled stereochemistry, especially when considering the efficiency of the intermolecular version of the reaction. The efforts to make the previously stoichiometric process catalytic in nickel