US PATENT SUBCLASS 549 / 310
.~.~.~.~.~.~.~.~ Additional chalcogen bonded directly to the bicyclo ring system

Current as of: June, 1999
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549 /   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) {2}
200  DF  .~.~ Oxygen containing hetero ring (e.g., dioxirane, etc.) {16}
263  DF  .~.~.~ Lactones (i.e., -C(=X)O-, wherein X is chalcogen, is part of the hetero ring) {6}
295  DF  .~.~.~.~ The lactone ring is five-membered {10}
297  DF  .~.~.~.~.~ Polycyclo ring system having the lactone ring as one of the cyclos {3}
302  DF  .~.~.~.~.~.~ Bicyclo ring system having the lactone ring as one of the cyclos {6}
307  DF  .~.~.~.~.~.~.~ The other cyclo of the bicyclo ring system is benzene (e.g., phthalides, etc.) {2}
310.~.~.~.~.~.~.~.~ Additional chalcogen bonded directly to the bicyclo ring system

DEFINITION

Classification: 549/310

(under subclass 307) Compounds wherein an additional chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to the bicyclo ring system.

(1) Note. The chalcogen required by this subclass is in addition to the double bonded oxygen of the -C-O- grouping of the lactone ring.

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