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Synthesis of 1-Hydroxymethylene-1,1-bis(phosphonic acids) from Acid Anhydrides: Preparation of a New Cyclic 1-Acyloxymethylene-1,1-bis(phosphonic acid).

โœ Scribed by Erwann Guenin; Estelle Degache; Jean Liquier; Marc Lecouvey


Publisher
John Wiley and Sons
Year
2004
Weight
20 KB
Volume
35
Category
Article
ISSN
0931-7597

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โœฆ Synopsis


Abstract

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Stereochemical aspects of the hypophosph
โœ Jarosล‚aw Lewkowski; Maล‚gorzata Rybarczyk ๐Ÿ“‚ Article ๐Ÿ“… 2008 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 174 KB

## Abstract Terephthalic Schiff bases react with hypophosphorous acid to form 1,4โ€phenyleneโ€bisโ€__N__โ€alkylโ€aminomethanephosphonous acids in moderate yields. NMR studies demonstrated thatโ€”for several examplesโ€”this reaction led to the exclusive formation of only one diastereomeric form. NMR investig