US PATENT SUBCLASS 548 / 229
.~.~.~.~.~ Chalcogen bonded directly at 2-position of the oxazole 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}
215  DF  .~.~.~ 1,3-oxazoles (including hydrogenated) {6}
225  DF  .~.~.~.~ Chalcogen bonded directly to ring carbon of the oxazole ring {3}
229.~.~.~.~.~ Chalcogen bonded directly at 2-position of the oxazole ring {3}
230  DF  .~.~.~.~.~.~> Nitrogen, halogen, or -C(=X)-, wherein X is chalcogen, attached directly to the oxazole ring by nonionic bonding
231  DF  .~.~.~.~.~.~> 3-position substituent contains ethylenic or acetylenic unsaturation or nitrogen
232  DF  .~.~.~.~.~.~> 4- or 5-position substituent contains chalcogen

DEFINITION

Classification: 548/229

(under subclass 225) Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to the carbon atom in the 2-position of the oxazole ring, i.e., the ring carbon between the ring oxygen and the ring nitrogen.