587845-46-3

Upstream product

• 65549-85-1 (Ge(CH(CH₃)2)2(C₆H₅))2 
• 142745-88-8 1,1,2,2-tetarisopropyl-1,2-dichloro-1,2-digermane 
• 536-74-3 phenylacetylene 
• 227598-75-6 11,11-diisopropyl-1,8,9,10-tetraphenyl-11-germatricyclo[6.2.1.0(2,7)]undeca-2,4,6,9-tetraene 
• 860801-91-8 Z-α,β-bis(chlorodiisoprpylgermyl)styrene 

Relevant academic research and scientific papers

Preparation, structural characterization of 1,2-digermacyclobut-3-enes, and their palladium-catalyzed insertion of alkynes

1,2-Digermacyclobut-3-enes were prepared by the treatment of Z-α,β-bis(chlorodialkylgermyl)ethenes with Na metal in boiling toluene and their structures were fully established by spectroscopic methods coupled with X-ray crystallography. In the presence of an appropriate catalyst, 1,2-digermacyclobut-3-enes reacted smoothly with alkynes to give the corresponding insertion products, 1,4-digermacyclohexa-2,5-dienes in moderate to good yields. Conventional complexes, such as [Pd(PPh3)4] and [Pt(PPh3)4], serve as efficient catalysts. The mechanism of the insertion reaction of alkynes into the germanium-germanium bond of 1,2-digermacyclobut-3-enes is discussed in terms of a key intermediate, a 1,4-digerma-2-buten-1,4-diylpalladium.

Palladium-catalyzed addition of tetragermetanes to alkynes

1,1,2,2,3,3,4,4-Octaisopropyltetragermetane (iPr2Ge)4 reacted with various alkynes in the presence of palladium complexes at 120 °C to afford 1,2,3,4-tetrahydro-1,2,3,4-tetragermins, Δ4-1,2,3-trigemolene, and 1H