Download PDF
Synlett 1999; 1999(11): 1772-1774
DOI: 10.1055/s-1999-2950
letter
© Georg Thieme Verlag, Rüdigerstr. 14, 70469 Stuttgart, Germany. All rights reserved. This journal, including all individual contributions and illustrations published therein, is legally protected by copyright for the duration of the copyright period. Any use, exploitation or commercialization outside the narrow limits set by copyright legislation, without the publisher's consent, is illegal and liable to criminal prosecution. This applies in particular to photostat reproduction, copying, cyclostyling, mimeographing or duplication of any kind, translating, preparation of microfilms, and electronic data processing and storage.

Synthesis of Polysilacage Compounds Containing a Trisilane Bridge

Masaki Shimizu* , Shuji Ishizaki, Hisashi Nakagawa, Tamejiro Hiyama
  • *Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan; E-mail: shimizu@npc05.kuic.kyoto-u.ac.jp
Further Information

Publication History

Publication Date:
31 December 1999 (online)

  PDF Download  Permissions and Reprints All articles of this category

Reductive lithiation of 1,1,5,5-tetrakis(phenylthio)-2,2,3,3,4,4-hexamethyl-2,3,4-trisilapentane or deprotonation of 1,5-bis(phenylthio)-2,2,3,3,4,4-hexamethyl-2,3,4-trisilapentane gave 1,5-bis(phenylthio)-1,5-dilithio-2,2,3,3,4,4-hexamethyl-2,3,4-trisilapentane which was silylated with dichlorodimethylsilane or 1,2-dichloro-1,1,2,2-tetramethyldisilane to give the corresponding tetrasilacyclohexane or pentasilacycloheptane, respectively. The tetrasilacyclohexane was transformed by reductive lithiation and sequential silylation to 2,2,3,3,4,4,6,6,7,7-decamethyl-2,3,4,6,7-pentasilabicyclo[3.1.1]heptane and 2,2,3,3,4,4,6,6,7,7,8,8-dodecamethyl-2,3,4,6,7,8-hexasilabicyclo[3.2.1]octane.

silicon - lithium - dianion - trisilane - cyclizations

      >