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Reaction of dimethyl 2-methyl- and dimethyl 2-phenyl-4-oxo-4H-chromen-3-yl-phosphonate with amines

✍ Scribed by Budzisz Elż; Pastuszko Slawomir

Publisher
Elsevier Science
Year
1999
Tongue
French
Weight
490 KB
Volume
55
Category
Article
ISSN
0040-4020

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✦ Synopsis

The reaction of dimethyl 2-methyl-and dimethyl 2-phenyl-4-oxo-4H-chromen-3-yl-phosphonate with various aliphatic and aromatic amines was investigated. A novel class of cyclic phosphonic analogues of ehromone, 1 (2-methoxy-3-[l-(alkylamino)ethylidene or benzylidene]-2,3-dihydro-2,4-dioxo-2~.%benzo[e]--[1,2]oxaphosphinane), was obtained when primary amines were used as nucleophiles. An analogous reaction with aromatic or secondary amines led to the hydrolysis of one methyl ester group in the phosphonic acid residue.

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