132775-06-5Relevant academic research and scientific papers
Addition of aldehydes to germenes: The influence of solvent
Allan, Christopher J.,Reinhold, Crispin R.W.,Pavelka, Laura C.,Baines, Kim M.
, p. 3010 - 3017 (2011/07/08)
The addition of trans-(2-phenylcyclopropyl) carboxaldehyde to dimesitylfluorenylidenegermane produced four diastereomers of a 1,2-oxagermin, 7a-d, 2,2,4,4- tetramesityl-1,3-dioxadigermetane (8), and fluorenylidene- (trans-2-phenylcyclopropyl)methane (9). The ratio of the products showed a strong dependence on the solvent: 7a-d were formed almost exclusively when ether or benzene was used as the solvent for the reaction, whereas 1,3-dioxadigermetane 8 and alkene 9 were the major products formed in THF. A mechanism is proposed to account for the observations.
Reactivity of germene mes2Ge=CR2 with cumulative unsaturation-containing compounds: Synthesis of new germanium heterocycles
Ech-Cherif El Kettani, Sakina,Lazraq, Mohamed,Ranaivonjatovo, Henri,Escudie, Jean,Couret, Claude,Gornitzka, Heinz,Atmani, Aziz
, p. 5364 - 5368 (2008/10/09)
Germene 1 reacts with the CO and CS double bonds respectively of phenylisocyanate and methylisothiocyanate by formal [2+2] cycloadditions, leading to four-membered ring derivatives 2 and 3. With CS2, dithiagermolane 11 and dithiadigermetane 12
Varied reactivity of the Germene Mes2Ge=CR2 toward nitriles
El Kettani, Sakina Ech-Cherif,Lazraq, Mohamed,Ranaivonjatovo, Henri,Escudie, Jean,Couret, Claude,Gornitzka, Heinz,Merceron, Nathalie
, p. 5062 - 5065 (2008/10/09)
The germene Mes2Ge=CR2 (1, CR2 = fluorenylidene) shows varied behavior toward nitriles. It reacts as a 1,2-dipole with t-BuCN giving a four-mepibered ring heterocycle, 2-aza-3-germacyclobut-1- ene, as a 1,4-dipole with PhCN, leading to a six-membered ring heterocycle, 3,4-dihydro-3-germaisoquinoline, and as a base, abstracting the α-H of R′CH2CN to give α-cyanogermanes (R′ = H, 2-thienyl, 2-FC6H4, 4-FC6H4).
The addition of oxygen to tetramesityldigermene
Samuel, Mini S.,Jennings, Michael C.,Baines, Kim M.
, p. 130 - 137 (2007/10/03)
The addition of atmospheric oxygen to tetramesityldigermene under a variety of conditions was studied. The addition of oxygen to the digermene, prepared by the photolysis of hexamesitylcyclotrigermane in THF, cleanly afforded 3,3,4,4-tetramesityl-3,4-digermadioxetane (7). The photolysis of hexamesitylcyclotrigermane in toluene in the presence of triethylsilane under the ambient atmosphere gave a very complex product mixture, from which 2,2,4,4-tetramesityl-2,4-digermadioxetane (9), tetramesityldigermaoxirane (10) and 2,2,4,4,5,5-hexamesityl-2,4,5-trigermadioxolane (11) were isolated and identified. The structures of compounds 9 and 11 were determined by X-ray crystallography.
Reactivity of dimesitylfluorenylidenegermane with unsaturated nitrogen compounds
Lazraq,Escudié,Couret,Satgé,Soufiaoui
, p. 1140 - 1143 (2008/10/08)
Dimesitylfluorenylidenegermane (1) reacts with ethylbenzylideneamine (PhCH=NEt) to give, according to a [2 + 2] cycloaddition, the very thermally stable four-membered-ring germaazetidine 2. In contrast, imines with a NH function, such as (diphenylmethylidene)amine (Ph2C=NH), react only as protic reagents. A [2 + 4] cycloaddition is observed with azobenzene, affording 5, which slowly aromatizes to 6 or thermally rearranges to give the [2 + 2] cycloadduct germadiazetidine 7. In the case of nitrosobenzene, only the germanone dimer 17 and imine 9 have been observed, probably via the preliminary formation of transient four-membered heterocycle 15.
N-Mesityl dimesitylgerma-imine
Riviere-Baudet, M.,Satge, J.,Morere, A.
, p. C7 - C11 (2007/10/02)
N-Mesityldimesitylgermaimine (1) which is obtained by photolysis of trimesitylgermylazide has also been detected in the reaction of dimesitylgermylene with mesitylazide. 1 was characterized at room temperature by its pseudo-Wittig reaction with benzaldehy
