109364-83-2Relevant academic research and scientific papers
Reactions of yttrium-carbon bonds with active hydrogen-containing molecules. A useful synthetic method for permethylyttrocene derivatives
Den Haan, Klaas H.,Wielstra, Ytsen,Teuben, Jan H.
, p. 2053 - 2060 (1987)
Reactions of the permethylyttrocene compounds Cp*2YCH(SiMe3)2 (1) and Cp*2YMe·THF (2) with a variety of active hydrogen-containing substrates are reported. With HCl the known complexes (Cp*2YCl)2 and Cp*2YCl·THF are formed. Reaction with 2,4-pentadione gives Cp*2Y(acac) (3). Alcoholysis of 1 in Et2O gives alkoxides Cp*2YOR·OEt2 (4, R = Me; 5, R = Et; 6, R = i-Pr). In the reactions with α-alkynes alkynyl complexes Cp*2YC≡CR·OEt2 (7a, R = Me; 8, R = Ph; 9, R = SiMe3) are formed. When 2 reacts with propyne, Cp*2YC≡CMe·THF (7b) is isolated. Reaction of 1 with excess of α-alkynes in nonpolar solvents shows a regioselective, catalytic dimerization to 1-en-3-ynes. Both 1 and 2 metalate pyridines at the α-position to give Cp*2Y(η2-NC5H4) (13) from 1 and Cp*2Y(η2-NC5H4)·THF (14) and Cp*2Y(η2-NC5H3,6-Me) (15) from 2. Thermolysis of 1 in mesitylene gives the complex Cp*2YDMB1 (16), which reacts with THF to form Cp*2YDMB·THF (17). The hydrides (Cp*2YH)2 (18) and Cp*2YH·THF (19) are synthesized by hydrogenolysis of 1 and 2, respectively. The hydride 19 is a catalyst in H/D exchange reactions betweer sp3-CH and sp2-CD bonds.
