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Nitrile Oxides, Nitrones, and Nitronates in Organic Synthesis : Novel ...

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REACTIONS OF DIPOLAR 1,3-CYCLOADDITION ([3 + 2] CYCLOADDITION) 309<br />

Me<br />

MeO<br />

Me<br />

N<br />

O<br />

O<br />

OH<br />

Me<br />

Me<br />

N<br />

O<br />

N<br />

O<br />

OH<br />

OH<br />

Me<br />

Me<br />

O<br />

N<br />

451a 457a 458a<br />

N<br />

b O<br />

MeO<br />

+<br />

−<br />

+<br />

−<br />

O<br />

O<br />

OMe<br />

O<br />

OMe<br />

OH<br />

MeO<br />

MeO<br />

O<br />

Me<br />

Me<br />

O<br />

460a<br />

O<br />

OMe<br />

O<br />

OMe<br />

O<br />

N<br />

N<br />

O<br />

OH<br />

OH<br />

MeO<br />

MeO<br />

Me<br />

O<br />

O<br />

Me<br />

N<br />

459a<br />

O<br />

OMe<br />

O<br />

OMe<br />

O<br />

N<br />

451b 457b 458b<br />

MeO<br />

MeO<br />

O<br />

O<br />

460b<br />

O<br />

OMe<br />

O<br />

OMe<br />

Scheme 2.222<br />

+<br />

+<br />

+<br />

+<br />

MeO<br />

MeO<br />

O<br />

O<br />

+<br />

N<br />

O<br />

O<br />

OMe<br />

+<br />

O<br />

OMe<br />

459b<br />

O<br />

OH<br />

OH<br />

OH<br />

OH

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