期刊
SYNLETT
卷 -, 期 13, 页码 2307-2310出版社
GEORG THIEME VERLAG KG
DOI: 10.1055/s-2004-832812
关键词
oxathioacetals; dithioacetals; protecting groups; polyphsphoric acid; silica gel
A simple and efficient method for the conversion of carbonyl compounds to oxathioacetals and dithioacetals by using polyphosphoric acid supported on silica gel (PPA/SiO2) as an acid catalyst have been developed. PPA/SiO2 is easily recovered from the reaction mixture and reused without a decrease in catalytic activity.
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