US PATENT SUBCLASS 546 / 185
.~.~.~.~ Process of forming a piperidine ring from a pyridine ring or from a partially hydrogenated pyridine ring

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546 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
*  DD  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM, OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS (Class 540, subclass 1) {1}
1  DF  .~.~ Hetero ring is six-membered consisting of one nitrogen and five carbons {24}
184  DF  .~.~.~ Piperidines {8}
185.~.~.~.~ Process of forming a piperidine ring from a pyridine ring or from a partially hydrogenated pyridine ring

DEFINITION

Classification: 546/185

Process of forming a piperidine ring from a pyridine ring or from a partially hydrogenated pyridine ring:

(under subclass 184) Processes wherein the piperidine ring is prepared by the hydrogenation of pyridine or partially hydrogenated pyridine.

(1) Note. This subclass includes all hydrogenation processes for the formation of piperidine from pyridine or partially hydrogenated pyridine, whether the hydrogenation reaction is a single step process or merely one step in a multistage reaction process.