860801-89-4

Upstream product

• 536-74-3 phenylacetylene 
• 7313-20-4 1,2-dichlorotetraethyldigermane 
• 860801-90-7 Z-α,β-bis(chlorodiethylgermyl)styrene 

Downstream Products

• 860801-99-6 1,1,4,4-tetraethyl-2,5-diphenyl-1,4-digermacyclohexa-2,5-diene 
• 860801-94-1 1,1,4,4-tetraethyl-2,6-diphenyl-1,4-digermacyclohexa-2,5-diene 
• 860801-96-3 1,1,4,4-tetraethyl-2-methyl-3,5-diphenyl-1,4-digermacyclohexa-2,5-diene 
• 860802-01-3 1,1,4,4-tetraethyl-3-methyl-2,5-diphenyl-1,4-digermacyclohexa-2,5-diene 
• 860801-93-0 1,1,4,4-tetraethyl-3-butyl-5-phenyl-1,4-digermacyclohexa-2,5-diene 
• 860801-98-5 1,1,4,4-tetraethyl-2-butyl-5-phenyl-1,4-digermacyclohexa-2,5-diene 
• 860801-95-2 1,1,4,4-tetraethyl-2-methylcarboxylate-6-phenyl-1,4-digermacyclohexa-2,5-diene 
• 860802-00-2 1,1,4,4-tetraethyl-2-methylcarboxylate-5-phenyl-1,4-digermacyclohexa-2,5-diene 

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.