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DIB is also known as bis(acetoxyiodo)benzene (BAIB)
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DIB is also known as bis(acetoxyiodo)benzene (BAIB).
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53
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Any source of visible light can be used. However, to obtain reproducible results, we carried out the scission with 80 W tungsten-filament lamps, available in DIY shops
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Any source of visible light can be used. However, to obtain reproducible results, we carried out the scission with 80 W tungsten-filament lamps, available in DIY shops.
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It must be taken into account that the addition of nitrogen nucleophiles is not irreversible under the reaction conditions and the epimerization of the initial 2,4-cis product would be favored when bulkier bases are used
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It must be taken into account that the addition of nitrogen nucleophiles is not irreversible under the reaction conditions and the epimerization of the initial 2,4-cis product would be favored when bulkier bases are used.
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95
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77954266931
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(4.R)-4-Benzoyloxy- (42) and (4.R)-4-pivaloyloxy-W-(methoxycarbonyl)-L- proline (43) were reported previously (ref.[7a,9], respectively)
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a) (4.R)-4-Benzoyloxy- (42) and (4.R)-4-pivaloyloxy-W-(methoxycarbonyl)- L-proline (43) were reported previously (ref.[7a,9], respectively)
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96
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The TBS ether 44 has also been described, but the TBDPS ether 45 is new. For substrate 44 see ref.[21a] and also
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