A REMARKABLE TENDENCY OF O-LITHIO-N-(2-LITHIOOXYETHYL)-N-METHYL-ANILINE TO FORM HETEROCYCLIC-DERIVATIVES BY ITS REACTION WITH DICHIORODIALKYLSILANES OR SILICON TETRACHLORIDE - SYNTHESIS OF 2,5,1-BENZOXAZASILEPINES AND OF THE SILASPIRO ANALOG
Id. Kostas et al., A REMARKABLE TENDENCY OF O-LITHIO-N-(2-LITHIOOXYETHYL)-N-METHYL-ANILINE TO FORM HETEROCYCLIC-DERIVATIVES BY ITS REACTION WITH DICHIORODIALKYLSILANES OR SILICON TETRACHLORIDE - SYNTHESIS OF 2,5,1-BENZOXAZASILEPINES AND OF THE SILASPIRO ANALOG, Tetrahedron letters, 38(50), 1997, pp. 8761-8764
The synthesis of 2,5,1-benzoxazasilepines 3 or the benzoxazasilaspiro
compound 4, has been achieved by the reaction of o-lithio-N-(2-lithioo
xyethyl)-N-methyl-aniline (2) with R2SiCl2 (R = Me, Et, Ph) or SiCl4,
respectively. The reaction led to the formation of cyclic products, ev
en under conditions favorable for the formation of polymeric materials
. (C) 1997 Elsevier Science Ltd.