Citation:
Zhen Li Min, Yi Hua Zhang, Yi Sheng Lai, Si Xun Peng. Asymmetric synthesis of 3-butylphthalide using isomannide and isosorbide as chiral auxiliaries[J]. Chinese Chemical Letters,
;2007, 18(11): 1361-1363.
doi:
10.1016/j.cclet.2007.09.038
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A new approach for asymmetric syntheses of (S) and (R)-3-n-butylphthalide (NBP) is presented. The diastereoselective addition of dibutylzinic to aromatic aldehyde 10 or 11 generated from isomannide-or isosorbide-derived chiral auxiliary afforded S-NBP or R-NBP in high optical yields.
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Keywords:
- Asymmetric synthesis,
- 3-n-Butylphthalide,
- Isomannide,
- Isosorbide
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