US PATENT SUBCLASS 568 / 772
.~.~.~.~.~.~ Preparing by reduction or dehydrogenation (e.g., by hydrogenation, etc.)

Current as of: June, 1999
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568 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {4}
300  DF  .~ OXYGEN CONTAINING (E.G., PERCHLORYLBENZENE, ETC.) {11}
700  DF  .~.~ Hydroxy containing (H of -OH may be replaced by a Group IA or IIA light metal) {10}
715  DF  .~.~.~ Benzene ring containing {8}
716  DF  .~.~.~.~ Phenols (H of -OH may be replaced by a Group IA or IIA light metal) {14}
763  DF  .~.~.~.~.~ Polyhydroxy (H of -OH may be replaced by a Group IA or IIA light metal) {10}
772.~.~.~.~.~.~ Preparing by reduction or dehydrogenation (e.g., by hydrogenation, etc.)

DEFINITION

Classification: 568/772

Preparing by reduction or dehydrogenation (e.g., by hydrogenation, etc.):

(under subclass 763) Processes which include preparing the compound by reduction or by dehydrogenation.

(1) Note. Included herein are processes wherein functional groups, such as keto groups, in aromatic compounds are subjected to reduction by reducing agents such as zinc dust, caustic soda solution, or hydrogen in the presence of a hydrogenation catalyst; or wherein hydrogenated polyhydroxy carbocyclic compounds are dehydrogenated to polyhydroxy phenols.