US PATENT SUBCLASS 546 / 304
.~.~.~ Nitrogen attached directly to the six-membered hetero ring by nonionic bonding


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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}
304.~.~.~ Nitrogen attached directly to the six-membered hetero ring by nonionic bonding {7}
305  DF  .~.~.~.~> Sulfur and acyclic nitrogen bonded directly to the same carbon
306  DF  .~.~.~.~> Plural acyclic nitrogens bonded directly to the same carbon or single bonded directly to each other
307  DF  .~.~.~.~> Plural nitrogens attached directly to the six-membered hetero ring by nonionic bonding {1}
309  DF  .~.~.~.~> Acyclic nitrogen bonded directly to a -C(=X)- group, wherein X is chalcogen
310  DF  .~.~.~.~> Having -C(=X)-, wherein X is chalcogen, bonded directly to the six-membered hetero ring
311  DF  .~.~.~.~> The nitrogen bonded additionally only to hydrogen
312  DF  .~.~.~.~> Chalcogen attached indirectly to the six-membered hetero ring by nonionic bonding


DEFINITION

Classification: 546/304

Nitrogen attached directly to the six-membered hetero ring by

nonionic bonding:

(under subclass 1) Compounds wherein nitrogen is attached directly to the six-membered hetero ring by nonionic bonding.

(1) Note. Examples of compounds provided for herein are: [figure] [figure]

SEE OR SEARCH THIS CLASS, SUBCLASS:

223, and 244, for tautomers of nitrogen attached directly to pyridine or partially hydrogenated pyridine (i.e., nitrogen double bonded directly to piperidine), e.g., [figure]