Evidence for Silicon-Directed Acid-Catalysed Ring Opening of a β,γ-Epoxy Silane: Reaction of 1,1-Dimethyl-1-silacyclohex-3-ene Oxide With p-Nitrobenzoic Acid
摘要:
在氯仿中,β,γ-环氧硅烷 (4) 与对硝基苯甲酸发生特异性开环反应,生成两种羟基酯 (14) 和 (15)。其机理涉及特定区域的开环,产生 β-硅稳定的硒离子 (18),该离子被对硝基苯甲酸反离子捕获。(14)的溶液构象证明在环的 C- Si 键轨道和 C-OCOC6H4NO2 反键轨道之间存在 σC- Si -σ* C-O 相互作用。在丙酮中,(4)与对硝基苯甲酸的反应采用不同的途径,由于溶剂对硅的侵蚀而产生无环产物。
Evidence for Silicon-Directed Acid-Catalysed Ring Opening of a β,γ-Epoxy Silane: Reaction of 1,1-Dimethyl-1-silacyclohex-3-ene Oxide With p-Nitrobenzoic Acid
摘要:
在氯仿中,β,γ-环氧硅烷 (4) 与对硝基苯甲酸发生特异性开环反应,生成两种羟基酯 (14) 和 (15)。其机理涉及特定区域的开环,产生 β-硅稳定的硒离子 (18),该离子被对硝基苯甲酸反离子捕获。(14)的溶液构象证明在环的 C- Si 键轨道和 C-OCOC6H4NO2 反键轨道之间存在 σC- Si -σ* C-O 相互作用。在丙酮中,(4)与对硝基苯甲酸的反应采用不同的途径,由于溶剂对硅的侵蚀而产生无环产物。
This invention comprises novel compounds which inhibit the activity of anti-apoptotic Bcl-2 family protein members, compositions containing the compounds and methods of treating diseases involving a defect in apoptosis, such as, for example, in the treatment of cancer.
Spirans XXI. Synthesis of silaazaspiro[4.5]decanes and silaazaspiro[5.5]undecanes
作者:Leonard M. Rice、Bhagvandas S. Sheth、James W. Wheeler
DOI:10.1002/jhet.5570100510
日期:1973.10
N-(2-Dimethylaminopropyl)-8,8-dimethyl-8-sila-2-azaspiro[4.5]decane (1) and N-(3-dimethyl-aminopropyl)-9,9-dimethyl-9-sila-3-azaspiro[5.5]undecane (2) have been synthesized from 4,4-dimethyl-4-silacyclohexanone (5). Biological evaluation of 1 and 2 indicated cytotoxic action against human cancer cells grown in tissue culture.