673500-78-2

Upstream product

• 1066-54-2 trimethylsilylacetylene 
• 673500-77-1 (Z)-β-bromo-o-iodo-β-trimethylsilylstyrene 
• 615-42-9 1,2-Diiodobenzene 
• 137648-47-6 1-iodo-2-ethynylbenzene 

Downstream Products

• 113509-27-6 1,2-bis<2-(trimethylsilyl)ethenyl>benzene 
• 183181-25-1 (Z,Z)-o-bis(β-bromo-β-trimethylsilylvinyl)benzene 

Relevant academic research and scientific papers

A versatile route to 3-benzoheteroepines containing group 15 and 16 heavier elements involving several novel ring systems, and their thermal stabilities.

The C-unsubstituted 3-benzoheteroepines (2a-g) containing group 15 (P, As, Sb, and Bi) and group 16 (S, Se, and Te) heavier elements were prepared by the reaction of the corresponding metal reagents with (Z,Z)-o-bis(beta-lithiovinyl)benzene (5) which was derived in two steps from a common o-phthalaldehyde (3). The heteroepines (2) thus obtained were thermally labile towards heteroatom extrusion, and their half-lives on heating estimated from (1)H-NMR spectral analysis showed that the 3-benzoheteroepines (2) were far less stable than the corresponding 1-benzoheteroepines (1). The 2,4-bis(trimethylsilyl)-3-benzoheteroepines (17) containing Sb, Bi, and Te were also prepared from o-diiodobenzene (9) in 6 steps and were found to be more stable than the corresponding C-unsubstituted heteroepines (2).