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C linkage by removal of hydrogen

The type of chemical procedure involved in the degradations of pyran-uronate and furanuronate systems just described proved to be a )8-elim-ination. The activated hydrogen atom on C-5 or C-4 is removed by suitable proton-acceptors, leading to unstable, intermediary anions which are stabilized by losing the C-0 linkage in the )8-position (that is, on C-4 of the pyranuronates, and on C-3 of the furanuronates), resulting in the endocyclic, enolacetal systems just described. [Pg.232]

See other pages where C linkage by removal of hydrogen is mentioned: [Pg.894]    [Pg.895]    [Pg.897]    [Pg.899]    [Pg.901]    [Pg.894]    [Pg.895]    [Pg.897]    [Pg.899]    [Pg.901]    [Pg.474]    [Pg.334]    [Pg.334]    [Pg.19]    [Pg.463]    [Pg.19]    [Pg.924]    [Pg.924]    [Pg.20]    [Pg.135]    [Pg.286]    [Pg.253]    [Pg.151]    [Pg.378]    [Pg.103]    [Pg.1368]    [Pg.952]    [Pg.24]    [Pg.593]    [Pg.1204]    [Pg.1226]    [Pg.135]    [Pg.836]    [Pg.474]    [Pg.633]    [Pg.135]    [Pg.39]    [Pg.18]    [Pg.1204]    [Pg.1226]    [Pg.4658]    [Pg.4680]    [Pg.330]    [Pg.135]    [Pg.11]    [Pg.56]    [Pg.633]    [Pg.312]    [Pg.111]    [Pg.135]    [Pg.162]    [Pg.165]    [Pg.214]    [Pg.10]   


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C hydrogenation

C hydrogenative

Hydrogen removal

Removal of hydrogen

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