- Improved synthesis of benzocyclobutenone by flash vacuum pyrolysis
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Flash vacuum pyrolysis of o-toluoyl chloride at 780 °C under 0.5 mmHg afforded benzocyclobutenone in higher yield (80%) than previously reported one (28 %).
- Suzzarini, Laurence,Lin, Jian,Wang, Zhi Yuan
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p. 1695 - 1696
(2007/10/03)
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- Synthesis of Cycloproparenes via Aromatization of 7-Oxanorbornenes with Low-Valent Titanium
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1H-Cyclopropanaphthalene 3c and the 2,7-diphenyl-substituted derivative 3a have been synthesized via cycloaddition of the appropriate isobenzofurans 1a and 1b to 1-bromo-2-chlorocyclopropene and aromatization of the adducts with low-valent Ti.The same procedure afforded the 2,7-dimethyl-1H-cyclopropaisoquinoline (15), but failed for the parent azacompound.Reaction of adducts of furans to 1-bromo-2-chlorocyclopropenes with low-valent Ti produced mixtures of cyclopropabenzenes 19 and 1,6-dihalogeno-1,3,5-cycloheptatrienes 18.The latter could be converted to cyclopropabenzenes with BuLi.
- Mueller, Paul,Schaller, Jean-Pierre
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p. 1608 - 1617
(2007/10/02)
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