- Synthesis and structures of o-(dihydrosilyl)(dimesitylboryl)benzenes
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O-(Dihydrosilyl)(dimesitylboryl)benzenes 1 were prepared in 6 steps. o-Dibromobenzene was mono-lithiated with n-BuLi and reacted with chloro(dimethoxy)silanes to afford o-C6H4(Br)[SiR(OMe) 2] (2) (R = Ph, Me). Bromine-lith
- Kawachi, Atsushi,Morisaki, Hiroshi,Zaima, Masatoshi,Teranishi, Takuya,Yamamoto, Yohsuke
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p. 2167 - 2171
(2010/09/15)
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- Isomerization of isolated double bonds to conjugated double bonds in optionally substituted cyclooctadienes
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In the isomerization of isolated double bonds to conjugated double bonds in optionally substituted cyclooctadienes, the isomerization catalyst comprises: (a) a transition metal compound of the formula Me(OR1)4, wherein Me is Ti, Zr, or Hf, and R1 is C1-4 alkyl, and (b) an organoaluminum compound of the general formula AlR23-n Xn, wherein R2 is C1-4 alkyl, n is 0, 1, 2, or a fraction between 1 and 2, and X is halogen or, if n is 1, also hydrogen; the molar ratio of (a):(b) being in the range from 0.1 to 1:1, the catalyst having prolonged activity and the isomerization being conducted at a temperature of 50°-200° C.
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