Pseudoesters and derivatives. Part 38. 1,3-dipolar cycloadditions of aryl azides and an aziridine, via azomethine ylide, to 2(5H)-furanones substituted at the 5-position by methoxy and sulfur bearing groups
G. Gonzalez et al., Pseudoesters and derivatives. Part 38. 1,3-dipolar cycloadditions of aryl azides and an aziridine, via azomethine ylide, to 2(5H)-furanones substituted at the 5-position by methoxy and sulfur bearing groups, HETEROCYCLE, 52(1), 2000, pp. 237-251
The behavior of the 2(5H)-furanones (1-3) towards p-methoxy- and p-nitrophe
nyl azides (4 and 12) has been investigated, in particular with respect to
the regio- and stereoselectivity. The 1,3-dipolar cycloaddition of the azom
ethine ylide generated by thermal ring opening of dimethyl trans-1-(p-metho
xyphenyl)aziridine-2,3-dicarboxylate (22) to 2(5H)-furanones (1-3) proceeds
in good yield and affords functionalized furo[3,4-c]pyrrol-3-one derivativ
es.