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Acetals and ketals cyclic

Hemi-acetals and -ketals, cyclic s. Lactols Hemiketals... [Pg.264]

Cyclic carbonates and cyclic boronates have also found considerable use as protective groups. In contrast to most acetals and ketals the carbonates are cleaved with strong base and sterically unencumbered boronates are readily cleaved by water. [Pg.119]

CYCLIC ACETALS AND KETALS 123 7. Acetonide (Isopropylidene Ketal) (Chart 3)... [Pg.123]

Formylbenzenesulfonate, 170 PROTECTION FOR CATECHOLS CYCLIC ACETALS AND KETALS... [Pg.144]

Catechols can be protected as diethers or diesters by methods that have been described to protect phenols. However, formation of cyclic acetals and ketals (e.g., methylenedioxy, acetonide, cyclohexylidenedioxy, diphenylmethylenedioxy derivatives) or cyclic esters (e.g., borates or carbonates) selectively protects the two adjacent hydroxyl groups in the presence of isolated phenol groups. [Pg.170]

Methyl-5-2-(methylthio)ethyl, 209 Cyclic Monothio Acetals and Ketals... [Pg.176]

See other pages where Acetals and ketals cyclic is mentioned: [Pg.108]    [Pg.108]    [Pg.13]    [Pg.119]    [Pg.119]    [Pg.121]    [Pg.125]    [Pg.127]    [Pg.129]    [Pg.131]    [Pg.133]    [Pg.170]    [Pg.171]    [Pg.175]    [Pg.176]    [Pg.177]    [Pg.185]    [Pg.185]    [Pg.187]    [Pg.191]    [Pg.193]    [Pg.195]    [Pg.197]    [Pg.201]    [Pg.209]    [Pg.265]    [Pg.22]    [Pg.201]    [Pg.248]    [Pg.287]    [Pg.293]    [Pg.294]   


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Acetal and ketal

Acetals and ketals

Acetals and ketals, cyclic monothio, to protect carbonyl groups

Acetals and ketals, cyclic to protect carbonyl groups

Acetals and ketals, cyclic to protect catechols

Acetals and ketals, cyclic to protect diols

Acetals cyclic

Acetals ketals

Cyclic acetalization

Cyclic ketal

Cyclic monothio acetals and ketals

Hemi-acetals and -ketals, cyclic

Hemi-acetals and -ketals, cyclic s. Lactols

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