21461-84-7, Name is (S)-( )-5-Oxo-2-tetrahydrofurancarboxylic Acid, belongs to tetrahydrofurans compound, is a common compound. Quality Control of (S)-( )-5-Oxo-2-tetrahydrofurancarboxylic AcidIn an article, once mentioned the new application about 21461-84-7.
(S)-5-Benzoyloxymethyl-3-[(E)-(dimethylamino)methylidene]tetrahydrofuran-2- one (6), prepared in 5 steps from L-glutamic acid (1), was used as precursor in a one step ‘ring switching’ synthesis of (S)-2-hydroxy-3-heteroaryl-1-propyl benzoates 13-18, 23, 24. In the reaction of 6 with 2-aminopyridine (21) and 2-amino-4,6-dimethylpyrimidine (22) the corresponding dimethylamine substitution products (25, 26) were obtained.
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Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem