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Short-term protecting groups

Chemoselectivity, for example, the differentiation between a ketone and an aldehyde, can in favorable cases be realized by capitalizing on the inherent reactivity of a specific functional group environment. Consider the conversion of 11 to 12 (Scheme 7.18). Traditionally, one tends to apply two short-term protecting groups to achieve the selective reduction of the keto function. [Pg.226]

In the short-term BHT supplementation experiment, it was found that no protection was obtained if BHT was added for only 1 or 2 weeks and then removed from the diet (2 weeks pre-carcinogen treatment). If it was continued for three weeks (to 1 week pre-carcinogen), only minimal protection was seen. If fed up to the time of DMBA-treatment or for one, two or three weeks post-carcinogen then removed, maximal protection was seen, comparable to the group that consumed BHT throughout the entire experimental period. These two... [Pg.146]

See other pages where Short-term protecting groups is mentioned: [Pg.220]    [Pg.121]    [Pg.121]    [Pg.122]    [Pg.126]    [Pg.128]    [Pg.220]    [Pg.255]    [Pg.220]    [Pg.121]    [Pg.121]    [Pg.122]    [Pg.126]    [Pg.128]    [Pg.220]    [Pg.255]    [Pg.558]    [Pg.246]    [Pg.549]    [Pg.551]    [Pg.119]    [Pg.123]    [Pg.587]    [Pg.397]    [Pg.398]    [Pg.213]    [Pg.65]    [Pg.299]    [Pg.293]    [Pg.205]    [Pg.133]    [Pg.44]    [Pg.293]    [Pg.958]    [Pg.308]    [Pg.121]    [Pg.218]    [Pg.705]    [Pg.218]    [Pg.71]    [Pg.298]    [Pg.92]    [Pg.57]    [Pg.62]    [Pg.403]    [Pg.85]    [Pg.346]    [Pg.518]    [Pg.455]    [Pg.327]    [Pg.26]    [Pg.397]    [Pg.398]    [Pg.585]   
See also in sourсe #XX -- [ Pg.121 , Pg.122 , Pg.126 ]



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