US PATENT SUBCLASS 548 / 370.7
.~.~.~.~.~ The chalcogen is bonded directly at the 4-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}
356.1  DF  .~.~.~ 1,2-diazoles (including hydrogenated) {8}
366.1  DF  .~.~.~.~ Chalcogen bonded directly to ring carbon of the diazole ring {7}
370.7.~.~.~.~.~ The chalcogen is bonded directly at the 4-position of the diazole ring

DEFINITION

Classification: 548/370.7

(under subclass 366.1) Compounds wherein the chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to ring carbon at the 4- position of the diazole ring.

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