US PATENT SUBCLASS 540 / 547
.~.~.~.~.~ Tricyclo ring system which contains the hetero ring as one of the cyclos


Current as of: June, 1999
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540 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1  DF  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS {6}
484  DF  .~.~ The hetero ring contains seven members including nitrogen and carbon {14}
544  DF  .~.~.~ The hetero ring contains chalcogen {2}
546  DF  .~.~.~.~ Polycyclo ring system which contains the hetero ring as one of the cyclos {2}
547.~.~.~.~.~ Tricyclo ring system which contains the hetero ring as one of the cyclos {4}
548  DF  .~.~.~.~.~.~> At least three ring hetero atoms in the tricyclo ring system
549  DF  .~.~.~.~.~.~> Sulfur and nitrogen are bonded directly to each other in the hetero ring
550  DF  .~.~.~.~.~.~> The nitrogen of the hetero ring is bonded directly to both remaining rings of the tricyclo ring system (e.g., dibenzo(b,e)(1,4)thiazepine, etc.)
551  DF  .~.~.~.~.~.~> Nitrogen bonded directly to ring carbon of the hetero ring


DEFINITION

Classification: 540/547

(under subclass 546) Compounds in which the polycyclo ring system consists of exactly three rings.

(1) Note. An example of a compound provided for herein is: [figure]