Substitution reactions of 2-phenylsulphonyl-piperidines and -pyrrolidines with carbon nucleophiles: Synthesis of the pyrrolidine alkaloids norruspoline and ruspolinone
作者:Dearg S. Brown、Philippe Charreau、Thomas Hansson、Steven V. Ley
DOI:10.1016/s0040-4020(01)86388-2
日期:1991.1
treatment with benzenesulphinic acid. On reaction with various carbon nucleophiles these sulphones gave good yields of substitution products. Typical nucleophiles used in these studies were organometallic reagents derived from Grignard reagents and zinc halide together with silyl enol ethers, silyl ketene acetals, allylsilanes and trimethylsilyl cyanide in the presence of a Lewis acid. These methods
Process for preparing fungicidal monoalkoxy and dialkoxy N-substituted
申请人:Hoechst Aktiengesellschaft
公开号:US04149941A1
公开(公告)日:1979-04-17
Novel alkoxy derivatives of N-substituted cyclic amines of the formula ##STR1## where R.sup.1 is hydrogen, an alkyl group having from 1 to 8 carbon atoms, an aryl group having from 6 to 10 carbon atoms, an alkoxy group having from 1 to 4 carbon atoms, an aralkoxy or aroxy group, R.sup.2 is a linear or branched alkylene group having from 1 to 4 carbon atoms in the chain, X is OR.sup.3 , where R.sup.3 represents an alkyl group having from 1 to 4 carbon atoms, Y is hydrogen, (C.sub.1 -C.sub.4)-alkyl, (C.sub.1 -C.sub.4)-O-alkyl, provided that in the case where R.sup.1 is an alkoxy group having from 1 to 4 carbon atoms, Y is not H.
Fungicidal alkoxy mono- and dialkoxy N-substituted cyclic amines
申请人:Hoechst Aktiengesellschaft
公开号:US04118500A1
公开(公告)日:1978-10-03
Novel alkoxy derivatives of N-substituted cyclic amines of the formula ##STR1## where R.sup.1 is hydrogen, an alkyl group having from 1 to 8 carbon atoms, an aryl group having from 6 to 10 carbon atoms, an alkoxy group having from 1 to 4 carbon atoms, an aralkoxy or aroxy group, R.sup.2 is a linear or branched alkylene group having from 1 to 4 carbon atoms in the chain, X is OR.sup.3, where R.sup.3 represents an alkyl group having from 1 to 4 carbon atoms, Y is hydrogen, (C.sub.1 -C.sub.4)-alkyl, (C.sub.1 -C.sub.4)--O-alkoxy, provided that in the case where R.sup.1 is an alkoxy group having from 1 to 4 carbon atoms, Y is not H. Several of the alkoxylated compounds are excellent fungicides.