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Surface groups selective neutralization

A brief exposure of diacetate derivatives of aromatic aldehydes to MW irradiation on neutral alumina surface rapidly regenerates aldehydes (Scheme 6.5) [36], The selectivity in these deprotection reactions is achievable by merely adjusting the time of irradiation. As an example, for molecules bearing acetoxy functionality (R = OAc), the aldehyde diacetate is selectively removed in 30 s, whereas an extended period of 2 min is required to cleave both the diacetate and ester groups. The yields obtained are better than those possible by conventional heating methods and the procedure is applicable to compounds bearing olefmic moieties such as cinnamaldehyde diacetate [36],... [Pg.185]

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See also in sourсe #XX -- [ Pg.237 ]



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Group selectivity

Selection group

Selective neutrality

Surface groupings

Surface groups

Surface selection

Surface selective

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