期刊
SYNLETT
卷 -, 期 15, 页码 2321-2324出版社
GEORG THIEME VERLAG KG
DOI: 10.1055/s-2003-42118
关键词
alpha-aminophosphonates; catalysis; tetra-tert-butylphthalocyanines; ketones; alpha-aminophosphonic acids
A novel and highly convenient catalytic variant of the synthesis of alpha-aminophosphonates on basis of the Kabachnik-Fields reaction [three-component reaction of ketones, diethylphosphite and either benzylamine (series a) of ammonium carbonate (series b)] in the presence of tetra-tert-butylphthalocyanines has been developed. This method affords alpha-aminophosphonates in acceptable yields for various ketones, including cyclic, sterically hindered and cage ketones. The unsubstituted alpha-aminophosphonic acids were also obtained from the corresponding esters of series b.
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