57767-09-6Relevant articles and documents
Synthesis of enol esters and dimerization of terminal alkynes catalyzed by neutral and cationic vinylidene ruthenium complexes
Opstal, Tom,Verpoort, Francis
, p. 314 - 320 (2003)
In the current study Ru(II) vinylidene complexes of the general type: Cl2Ru{=C=C(H)R}(PR′3)L (R = Ph, SiMe3, R′ = Ph, Cyclohexyl (Cy) and L = phosphine or N-heterocyclic carbene) are synthesized and tested for the addition of carboxylic acids to terminal alkynes. A careful choice of the catalytic system, substrate and carboxylic acid gives access to alk-1-en-2-yl esters, alk-1-en-1-yl esters or enyne dimerization products. Furthermore, an extension was made to synthesize an analogous 14-electron species by treating one of the complexes with AgBF4 and its influence on the catalytic activity and selectivity are investigated.
Te-1-acylmethyl and Te-1-iminoalkyl telluroesters: Synthesis and thermolysis leading to 1,3-diketones and O-alkenyl and O-imino esters
Nakaiida, Shoho,Kato, Shinzi,Niyomura, Osamu,Ishida, Masaru,Ando, Fumio,Koketsu, Jugo
experimental part, p. 930 - 946 (2010/08/04)
A series of Te-1-acylmethyl carbotelluroates was prepared in good isolated yields from the reaction of potassium carbotelluroates with -haloketones in acetonitrile. Thermolysis of the telluroesters afforded vinyl esters in 20-50% yields, while treatment of the carbotellurorates with potassium t-butanolate led to 1,3-diketones in 30-75% yields with the liberation of black tellurium. The reaction of potassium carbotelluroates with -haloaceto oximes gave O-acyl oximes in 50-70% yields via Te-1-iminomethylcarbotelluroates. Copyright Taylor & Francis Group.
