Side-chain silylation of heterocyclic derivatives. The sythesis of 3-methyl-5-(trimethylsilylmethyl)-1,2,4-oxa-diazole and the atttempted synthesis of 3-methyl-4-nitro-5(trimethylsilymethyl)isoxazole via organolithium reagents
作者:Roberto Pepino、Alfredo Ricci、Maurizio Taddei、Piero Tedeschi
DOI:10.1016/s0022-328x(00)81946-4
日期:1982.5
Silylation of activated heterocyclic systems via treatment with organolithium reagents followed by coupling with Me3SiCl, leads to the expected product in the case of 3,5-dimethyl-1,2,4-oxadiazole, whereas for 3,5-dimethyl-4-nitroiso-xazole the predominant reaction is addition of the lithiating agent, to give after work-up 3,5-dimethyl-5-butyl-4-nitro-4,5-isoxazoline.
通过有机锂试剂处理,然后与Me 3 SiCl偶联,使活化的杂环系统进行甲硅烷基化,生成3,5-二甲基-1,2,4-恶二唑的预期产物,而生成3,5-二甲基-4的预期产物-硝基异恶唑的主要反应是加入锂化剂,在后处理后得到3,5-二甲基-5-丁基-4-硝基-4,5-异恶唑啉。