General approach to 6-tosyl-2, 3, 4, 5-tetrahydro-1H-1, 3-diazepin-2-ones via nucleophile-mediated ring expansion of tetrahydropyrimidines
AA Fesenko, ML Tullberg, AD Shutalev
Index: Fesenko, Anastasia A.; Tullberg, Marcus L.; Shutalev, Anatoly D. Tetrahedron, 2009 , vol. 65, # 11 p. 2344 - 2350
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Citation Number: 30
Abstract
A general six-step approach to 6-tosyl-2, 3, 4, 5-tetrahydro-1H-1, 3-diazepin-2-ones has been developed. The key step involves a ring expansion reaction of 4-mesyloxymethyl-or 4- tosyloxymethyl-5-tosyl-1, 2, 3, 4-tetrahydropyrimidin-2-one mediated by nucleophilic reagents.
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