63139-22-0Relevant academic research and scientific papers
Alternative synthesis of (Z)-1-aryl-1-(tributylstannyl)-2-(triethylgermyl)ethenes and the unprecedented germyl 1,2-migration during the destannylation of the adducts
Nakano, Taichi,Senda, Yoshiya,Miyamoto, Takashi
, p. 1408 - 1409 (2007/10/03)
A specific combination catalyst, Pd(dba)2 and 4-ethyl-1-phospha-2,6,7-trioxabicyclo[2.2.2]octane, effectively catalyzed the addition of tributyl(triethylgermyl)stannane to aryl-acetylenes in tetrahydrofuran to give (Z)-1-aryl-2-(germyl)-1-(stannyl)ethenes in high yields. The (Z)-1-aryl-2-(germyl)-1-(stannyl)ethenes were subject to the unprecedented germyl 1,2-migration during the destannylation using HI / TBAI in toluene to produce 1-aryl-1-(germyl)ethenes in high yields.
The π-(Hydroxyalkenyl)germane complexes Rh(acac){η2-(E)-Et3GeCH=CHC(OH)R2}(PCy 3) (R = Me, Ph) as intermediates in the hydrogermylation of alkynols catalyzed by Rh(acac)(cyclooctene)(PCy3)
Esteruelas, Miguel A.,Martín, Marta,Oro, Luis A.
, p. 2267 - 2270 (2008/10/08)
The (hydroxyalkenyl)germanes (E)-R3Ge-CH=CHC(OH)R′2 (R = Et, Ph; R′ = Me, Ph) are prepared in quantitative yield, and in a catalytic manner, by addition of germanes to the alkynols HC≡CC-(OH)R′2 (R′ = Me, Ph) in the presence of the complex Rh(acac)(cyclooctene)(PCy3). During the reactions four cycles are evident. They have as a common point the intermediates Rh(acac){η2-(E)-CH(GeR3)=~CHC(OH)-R′ 2}(PCy3), which have been isolated for R=Et and R′ = Me, Ph.
