Chemical transformations on diols anchored to a triosmium cluster

Article abstract of DOI:10.1039/b103800c

Clusters of the general formula Os3(μ-H)(CO)10(μ-O-OH), 2, have been synthesised from the reaction of Os3-(μ-H)(CO)10(μ-OH) with the appropriate glycol. The free-OH function of the glycol derivative, OS3(μ-H)(CO)10-(μ-OCH2CH2OH), 2a, can be elaborated by esterification with benzoyl chloride to give Os3(μ-H)(CO)10-(μ-OCH2CH2OC(O)Ph), 3, and partially oxidised to give Os3(μ-H)(CO)10(μ-OCH2CHO), 4a. Cluster 4a itself can undergo allylation to give Os3(μ-H)(CO)10(μ-OCH2CH(OH)CH2Ch=CH2), 5, or react with PhMgBr to give Os3(μ-H)(CO)10(μ-OCH2CH(OH)Ph), 2e. Cluster 2a can also be functionalised at the cluster metal core with PPh3 as Os3(μ-H)(CO)9(μ-OCH2CH2OH)(PPh3), 6.