US PATENT SUBCLASS 544 / 378
.~.~.~.~.~.~.~.~.~ Plural ring chalcogens in the polycyclo ring system or the piperazine ring bonded directly to the polycyclo ring system


Current as of: June, 1999
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544 /   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) {1}
1  DF  .~.~ Hetero ring is six-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazines, etc.) {6}
224  DF  .~.~.~ The six-membered hetero ring consists of two nitrogens and four carbons (e.g., 1,2-diazines, etc.) {9}
336  DF  .~.~.~.~ 1,4-diazines {9}
358  DF  .~.~.~.~.~ Piperazines (i.e., fully hydrogenated 1,4-diazines) {12}
359  DF  .~.~.~.~.~.~ Additional hetero ring containing {4}
374  DF  .~.~.~.~.~.~.~ Ring chalcogen in the additional hetero ring {2}
375  DF  .~.~.~.~.~.~.~.~ Polycyclo ring system having the additional hetero ring as one of the cyclos {2}
378.~.~.~.~.~.~.~.~.~ Plural ring chalcogens in the polycyclo ring system or the piperazine ring bonded directly to the polycyclo ring system


DEFINITION

Classification: 544/378

Plural ring chalcogens in the polycyclo ring system or the piperazine ring bonded directly to the polycyclo ring system:

(under subclass 375) Compounds wherein the polycyclo ring system contains at least two ring chalcogens (i.e., oxygen, sulfur, selenium, or tellurium), or the polycyclo ring system is bonded directly to the piperazine ring.

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