94070-47-0

Upstream product

• 530-48-3 1,1-Diphenylethylene 
• 135738-42-0 7,7-dimethyl-7-germanorbornadiene 

Downstream Products

• 94070-48-1 1,1-dimethyl-3,4-diphenyl-1-germacyclopent-3-ene 
• 94070-43-6 cis-1,1-dimethyl3,4-diphenylgermacyclopentane 

Relevant academic research and scientific papers

Germacyclopentanes via cycloadditions of free dimethylgermylene to styrenes

Free Me2Ge gives cycloadditions with 2 mol of α-substituted styrenes via a regiospecific but not stereospecific mechanism. Equal amounts of syn/anti 3,4-diphenylgermacyclopentanes are formed in good yield, those arising from α-substituted styrenes bearing additional substituents in these positions, and no 2,5- or 2,4-substituted rings. The 4,4,5,5-Ph4 derivative has an extraordinarily strained five-membered ring with a very long C3-C4 bond (1.626 A?) and αC-Ge-C = 90.3°. Styrenes without a =CH2 group as well as a number of other olefins do not react rapidly enough. A two-step mechanism involving an 1:1 adduct is suggested.