New Au(I) complexes with bulky, biphenyl phosphines are the most reactive catalysts for the cyclizations of enynes. 1,6-Enynes with an aryl ring at the alkyne give 2,3,9,9a-tetrahydro-1H-cyclopenta[b]naphthalenes by a 5-exo-dig cyclization followed by a Nazarov-type ring expansion. 1,8-Dien-3-ynes also cyclize by a 5-exo-dig pathway to form hydrindanes.

Gold(I) complexes are the most active catalysts for alkoxy- or hydroxycyclization and for skeletal rearrangement reactions of 1,6-enynes. Intramolecular alkoxycyclizations also proceed efficiently in the presence of gold(I) catalysts. The first examples of the skeletal rearrangement of enynes by the endocyclic cyclization pathway are also documented. Iron(III) is also able to catalyze exo and endo skeletal rearrangements of 1,6-enynes, although the scope of this transformation is more limited. The gold(I)-catalyzed endocyclic cyclization proceeds by a mechanism different from those followed in the presence of PdII, HgII, or RhI catalysts.

Support for the direct route: That cyclobutenes are not necessary intermediates in the skeletal rearrangement of enynes is supported by DFT calculations and kinetic studies. Cyclobutenes may arise from the corresponding syn-cyclopropylgold(I) carbene

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The cyclizations of enynes substituted at the alkyne gives products of formal [4+2] cyclization with Au(I) catalysts. 1,8-Dien-3-ynes cyclize by a 5-exo-dig pathway to form hydrindanes. 1,6-Enynes with an aryl ring at the alkyne give 2,3,9,9a-tetrahydro-1H-cyclopenta[b]naphthalenes by a 5-exo-dig cyclization followed by a Friedel-Crafts-type ring expansion. A 6-endo-dig cyclization is also observed in some cases as a minor process, although in a few cases, this is the major cyclization pathway. In addition to cationic gold complexes bearing bulky biphenyl phosphines, a gold complex with tris(2,6-di-tert-butylphenyl)phosphite is exceptionally reactive as a catalyst for this reaction. This cyclization can also be carried out very efficiently with heating under microwave irradiation. DFT calculations support a stepwise mechanism for the cycloaddition by the initial formation of an anti-cyclopropyl gold(I)-carbene, followed by its opening to form a carbocation stabilized by a pi interaction with the aryl ring, which undergoes a Friedel-Crafts-type reaction.

PurposeWith the decline of some well‐established firms, the diminishing competitive power of many companies in an increasingly globalized market and the need for organizational renewal and transformation, interest in organizational learning has grown. Senior managers in many organizations are convinced of the importance of improving learning in their organizations. Therefore, it is necessary not only to clarify the concept of organizational learning, but also to establish the relationship between it and business performance. This paper aims to explore this relationship.Design/methodology/approachThe degree to which organizational learning influences business performance is investigated for 195 Spanish firms with more than 200 employees using the statistical technique of structural equation modeling.FindingsThe results provide support for the view that organizational learning contributes positively both to innovation and competitiveness and to economic/financial results. Furthermore, the results show a positive relationship between innovation and competitiveness and economic/financial results.Originality/valueClarifies the concept of organizational learning and establishes the relationship between it and business performance.

Three pathways actually compete in metal-catalyzed cyclizations of enynes in which the metal selectively activates the alkyne: an endocyclic process and two exo-cyclizations, one proceeding by anti attack of the alkene and a second one resulting in a syn addition. Although cyclobutenes may be formed in transition-metal-catalyzed cyclization of some enynes, particularly, 1,7-enynes, these compounds are not necessarily the intermediates in the skeletal rearrangement. Cyclobutenes are formed by ring expansion of syn-cyclopropyl metal-carbenes formed in the syn pathway.

The role of human resource management in learning organizations has been discussed by a number of researchers. It is suggested that some of the more traditional personnel functions of HR practitioners may be tailored to encourage a focus on learning and thus to help achieve organizational goals. However, there is a lack of empirical studies that explore the relationship between human resource management and organizational learning. This article aims to address this shortcoming. More specifically, the purpose of this article is to analyse the relation between four human resources practices (hiring, training, compensation and decision-making) and organizational learning. The hypotheses proposed were tested on a sample of 195 Spanish companies using the structural equation modelling technique. The results support that selective hiring, strategic training and employee participation in decision-making positively influence organizational learning.