H. F. Olivo et al. / Tetrahedron: Asymmetry 16 (2005) 3507–3511
3511
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white solid 135 mg (68%). Silica gel TLC R 0.48 (9:1
f
22
chloroform–methanol); mp 158–159 ꢁC; ½aꢁ = +79 (c
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1
3
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3
1
1
5
34.7 (C), 134.3 (C), 129.62 (2CH), 129.58 (2CH),
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This research was supported by the National Science
Foundation (EEC-0310689). We thank Prof. Jack Ros-
azza for his invaluable advice and encouragement. We
thank Proffers. Rebecca Parales (U California-Davis)
and David T. Gibson (U Iowa) for the E. coli NDO
and TDO, Prof. Marko Mihovilovic (U Austria) for
the E. coli CHMO and CPMO, Prof. Karl-H. Engesser
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