1,3-Oxazines and Related Compounds. XIV. Facile Synthesis of 2,3,6-Trisubstituted 2,3-Dihydro-1,3-oxazine-5-carboxylic Acids and 1,4-Disubstituted 3-Acyl-β-lactams from Acyl Meldrum's Acids and Schiff Bases(Organic,Chemical)
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Simple preparations of 2,3,6-trisubstituted 2,3-dihydro-1,3-oxazine-5-carboxylic acids (4) and 1,4-disubstituted 3-acyl-β-lactams (5) from acyl Meldrum's acids and Schiff bases were carried out. 2,3-Disubstituted 5-acyl-3,4,5,6-tetrahydro-2H-1,3-oxazine-4,6-diones (3) were isomerized to 4 in a chlorotrimethylsilane-triethylamine system and to 5 by hydrogen chloride.
- 公益社団法人日本薬学会の論文
- 1987-05-25
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