作者:V. A. Maksakov、V. P. Kirin、A. V. Golovin
DOI:10.1007/bf00707232
日期:1995.10
The reactions of cluster (mu-H)Os-3(CO)(10)(mu-OH) with ethyl and isopropyl esters of L-oxyproline were studied. In the presence of Me(3)NO intermediate complex 3(mu-H)Os-3(CO)(9)(mu-OH)L (L - isopropyl ester of L-oxyproline) is formed, which slowly converts to the more stable cluster (mu-H)Os-3(CO)(9)mu,eta(2)-OCHCH2CH(COOPri)NHCH2}. Cluster complexes containing chelate-bridging heterocycles were also obtained by heating(mu-H)Os-3(CO)(10)(mu-OH) with esters of L-oxyproline. In both cases, only one of the possible diastereomeric complexes (mu-H)Os-3(CO)(9)mu,eta(2)-OCHCH2CH(COOPri)NHCH2} (R = Et, Pr-i) is formed, which indicates that the reactions are stereospecific. Based on analysis of Dreiding's models, an attempt to determine the absolute configuration of the obtained clusters was made.