US PATENT SUBCLASS 548 / 316.7
.~.~.~.~.~ Additional chalcogen attached directly to ring nitrogen of the diazole ring by nonionic bonding

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}
316.4  DF  .~.~.~.~ Chalcogen bonded directly to ring carbon of the diazole ring (e.g., N-vinyl-N, N'ethylene urea, etc.) {9}
316.7.~.~.~.~.~ Additional chalcogen attached directly to ring nitrogen of the diazole ring by nonionic bonding

DEFINITION

Classification: 548/316.7

(under subclass 316.4) Compounds containing an additional chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) which is attached directly to ring nitrogen of the diazole ring by nonionic bonding.

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