[EN] PROCESS FOR PRODUCING BISBENZIL COMPOUNDS<br/>[FR] PROCÉDÉ DE PRODUCTION DE COMPOSÉS BISBENZILE
申请人:SHOWA DENKO KK
公开号:WO2003042148A2
公开(公告)日:2003-05-22
A bis(phenylacetyl)benzene compound is reacted with a sulfoxide compound and a halide in the presence of an acid and an organic solvent. Also, a bis((-ketonitrile) compound is reacted in an acidic environment in the presence of water, a halide and a sulfoxide compound. It is thereby possible to produce bisbenzil compounds at a high yield and with high productivity.
Preparation of 2,3-dihydro-1H-spiro[isoquinoline-4,4′-piperidine] via an N-sulfonyl Pictet–Spengler reaction
A high yielding synthesis of variously substituted 2,3-dihydro-1H-spiro[isoquinoline-4,4′-piperidine] is reported. N-(2-nitrophenyl)sulfonyl was successfully used as both an activating and protecting group for the key Pictet–Spengler reaction.
Process for producing a 3-methyl-2-(4-halophenyl)butyronitrile
申请人:Sumitomo Chemical Company, Limited
公开号:US04144264A1
公开(公告)日:1979-03-13
A process for producing 3-methyl-2-(4-halophenyl)butyronitrile, which is an important intermediate for the production of insecticides, in a high yield and a high purity even on a commercial scale comprising reacting a p-halophenylacetonitrile having a p-halobenzyl alcohol content of not more than 1.0 % by weight, with an isopropyl halide having an isopropyl alcohol content of not more than 1.0 % by weight.