US PATENT SUBCLASS 546 / 20
.~.~.~.~.~.~ At least three ring nitrogens in the two rings which form the spiro

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


546 /   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 consisting of one nitrogen and five carbons {24}
15  DF  .~.~.~ Spiro {1}
16  DF  .~.~.~.~ The spiro includes the six-membered hetero ring {2}
19  DF  .~.~.~.~.~ At least three ring hetero atoms in the two rings which form the spiro {1}
20.~.~.~.~.~.~ At least three ring nitrogens in the two rings which form the spiro

DEFINITION

Classification: 546/20

At least three ring nitrogens in the two rings which form the spiro:

(under subclass 19) Compounds wherein the spiro ring system includes at least two ring nitrogen atoms in addition to the one ring nitrogen of the six-membered hetero ring.

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