Allylic germatranes derived from triethanolamine can be prepared with moderate control of regioselectivity by two complementary routes. The first of these is through the preparation of the precursorallylic germanium trichlorides by a transmetallation reaction between germanium(IV) chloride and the corresponding allylic tributylstannanes followed by alcoholysis and reaction with triethanolamine. The
Karlov; Shutov; Akhmedov, Russian Journal of General Chemistry, 2000, vol. 70, # 6, p. 989 - 990
作者:Karlov、Shutov、Akhmedov、Lorberth、Zaitseva
DOI:——
日期:——
One-Step Syntheses of Styryl Germatranes via Rhodium- or Palladium-Catalyzed Hydrogermylation of Arylacetylenes by HGe(OCH<sub>2</sub>CH<sub>2</sub>)<sub>3</sub>N
作者:J. W. Faller、Roman G. Kultyshev
DOI:10.1021/om020714d
日期:2003.1.1
The addition of germatrane, HGe(OCH2-CH2)(3)N (1), to terminal acetylenes is catalyzed by [Cp*RhCl2](2) and yields styrylgermatranes The stereochemistry of the double bond can be controlled by the choice of solvent. In methylene chloride, (E)-beta-styrylgermatranes are the major products, whereas in toluene (Z)-styrylgermatranes are the major products. The addition is also catalyzed by Pd(PPh3)(4), giving (E)-beta-styrylgermatranes regardless of solvent.