Titanium(IV) chloride-mediated ring cleavage and Michael addition of 3,3-dialkylcyclobutanones and 3-[(trimethylsilyl)methyl]-cyclobutanones
β′-Chloro and β′,γ′-unsaturated trichlorotitanium enolates, which were formed in situ by titanium(IV) chloride-mediated ring cleavage of 3,3-dialkylcyclobutanones and 3-[(trimethylsilyl)methyl]cyclobutanones, reacted with enones to give Michael adducts wi
Synthesis of [1.1.1]Propellanes by Cyclization of 3-Alkylidenecyclobutylidenes
Starting from tricyclo[3.1.0.02,6]hexane 5 and 1-bromobicyclo[1.1.0]butane 6, a series of [1.1.1]propellanes 15 and 21 has been synthesized which carry alkyl, aryl, alkenyl, and alkynyl groups. Propellane formation proceeded via 1-bromo-1-chlor
Kenndoff, Monika,Singer, Andrea,Szeimies, Guenter
p. 217 - 232
(2007/10/03)
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