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

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266 NITRONES: NOVEL STRATEGIES IN SYNTHESIS<br />

+<br />

N<br />

O<br />

−<br />

R large -M<br />

R small<br />

PhLi<br />

OMe<br />

N<br />

O<br />

1. PhMgBr<br />

2. Cu(OAc) 2, O 2<br />

aq. NH 3<br />

N<br />

O<br />

R small<br />

R large<br />

Ph 1. PhMgBr<br />

+<br />

N<br />

2. Cu(OAc) 2, O2 Ph N<br />

aq. NH3 − •<br />

O<br />

Ph<br />

Scheme 2.162<br />

N<br />

H<br />

Ph<br />

R large<br />

R small<br />

A Stereo-course proposed by Keana<br />

Ph OMe<br />

PhMgBr<br />

MeO<br />

+<br />

N<br />

Ph (Et)<br />

PhMgBr<br />

−<br />

O<br />

Mg<br />

Br<br />

OMe<br />

Ph<br />

MeO<br />

PhMgBr<br />

+<br />

−<br />

+<br />

+<br />

N<br />

−<br />

−<br />

O<br />

Al<br />

Et<br />

MeO<br />

B Stereo-course with PhLi<br />

Ph<br />

C Stereo-course with PhMgBr<br />

Ph<br />

OMe<br />

Et<br />

MeO<br />

Ph<br />

D Stereo-course with PhLi <strong>and</strong> Et 2AlCl<br />

Scheme 2.163<br />

MeO<br />

Ph<br />

N<br />

1. Zn, HCl aq.<br />

2. NaOH<br />

N<br />

OH<br />

OH<br />

trans-<br />

N<br />

N<br />

OH<br />

cis-<br />

OH<br />

cis-<br />

O<br />

R small<br />

R large<br />

Ph OMe<br />

Ph<br />

OMe<br />

Ph OMe<br />

Ph

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