US PATENT SUBCLASS 548 / 331.5
.~.~.~.~.~ The nitrogen is bonded directly at the 2-position of the diazole ring

Current as of: June, 1999
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548 /   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) {4}
100  DF  .~.~ Hetero ring is five-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazoles, etc.) {18}
300.1  DF  .~.~.~ 1,3-diazoles (including hydrogenated) {9}
326.5  DF  .~.~.~.~ Nitrogen attached directly to the diazole ring by nonionic bonding {3}
331.5.~.~.~.~.~ The nitrogen is bonded directly at the 2-position of the diazole ring {3}
332.1  DF  .~.~.~.~.~.~> Having -C(=X)-, wherein X is chalcogen, bonded directly to the diazole ring
332.5  DF  .~.~.~.~.~.~> Chalcogen, additional nitrogen, or -C(=X)-, wherein X is chalcogen or nitrogen, attached directly to the nitrogen by nonionic bonding
333.1  DF  .~.~.~.~.~.~> Benzene ring bonded directly to the nitrogen

DEFINITION

Classification: 548/331.5

(under subclass 326.5) Compounds wherein the nitrogen is bonded directly to the ring carbon in the 2- position of the diazole ring, i.e., the ring carbon between the two ring nitrogens.

(1) Note. This subclass contains, for example: [figure] [figure]