Synthesis and neurotropic activity of silyl propargyl alcohols and sulfides

Ramona Abele, Liga Zvejniece, Edgars Abele, Kira Rubina, Pavel Arsenyan, Marina Vandish, Olga Pudova, Maija Dambrova, Ilona Domracheva, Irina Shestakova, Juris Popelis, Edmunds Lukevics

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


New silicon derivatives of hetaryl propargyl sulfides and propargyl alcohols were synthesized using phase-transfer catalytic and organometallic methods. These compounds were tested for acute toxicity and neurotropic activity in the pentylenetetrazole test, and for phenamine hypothermia, phenamine hyperactivity and passive avoidance response tests. We have found that the silyl propargyl alcohols and sulfides are low toxicity compounds, the LD50 being 700-1300 mg kg-1. In the PAR test, the synthesized compounds exerted some memory-improving activity. For di-1-(3-methyl-3-hydroxybutyn-1-yl)methyl(3-iodopropyl)silane (16) the effect was statistically significant and amounted to 250% of the control level. In the pentylenetetrazole test, all compounds possessed anticonvulsant activity, the most active compounds being 3-(benzoxazolylthio)-1-propynyl(trimethyl)silane (6) and di-[2- (1-hydroxycyclohexyl)ethynyl]methyl(3-iodopropyl)silane (17). The phenamine-induced hyperactivity was significantly elevated after treatment with (3-trimethylsilyl-2-propynyl)thiobenzene (1) or di-[1-(3-methyl-3-hydroxybutyn-1-yl)diphenylsilane (12). Our data show that these silicon derivatives of hetaryl propargyl sulfides and propargyl alcohols possess certain memory improving and anticonvulsant activity that should be studied in detail to evaluate the receptor systems involved.

Original languageEnglish
Pages (from-to)181-186
Number of pages6
JournalApplied Organometallic Chemistry
Issue number4
Publication statusPublished - Apr 2004
Externally publishedYes


  • Hetaryl propargyl sulfides
  • Neurotropic activity
  • Silyl propargyl alcohols

Field of Science*

  • 1.4 Chemical sciences

Publication Type*

  • 1.1. Scientific article indexed in Web of Science and/or Scopus database


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