US PATENT SUBCLASS 536 / 27.7
.~.~.~.~.~.~.~.~.~ Chalcogen, halogen, or benzene bonded directly to carbon of the purine ring system (e.g., isoguanosine, 2-fluoroadenosine, etc.)

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1.11  DF  .~ Carbohydrates or derivatives {15}
18.7  DF  .~.~ Nitrogen containing {13}
22.1  DF  .~.~.~ N-glycosides, polymers thereof, metal derivatives (e.g., nucleic acids, oligonucleotides, etc.) {12}
27.1  DF  .~.~.~.~ N-glycosides wherein the N is part of an N-hetero ring which hetero ring is part of a polycyclo ring system containing an N-hetero ring and an additional hetero ring (e.g., rebeccamycin, etc.) {3}
27.13  DF  .~.~.~.~.~ Bicyclic ring system consisting of the N-hetero ring fused to another hetero ring (e.g., 2-azaadenines, 6-azaadenines, etc.) {2}
27.2  DF  .~.~.~.~.~.~ The bicyclic ring system consists of a 1,3-diazine ring, which may be hydrogenated, fused to a five-membered N-hetero ring (e.g., purine isoesters like tubercidin, toyocamycin, sangivamycin, sparsomycin A, etc.) {1}
27.21  DF  .~.~.~.~.~.~.~ The five-membered N-hetero ring is 1,3-diazole, which may be hydrogenated (e.g., 6-chloropurine nucleoside, nebularin, etc.) {6}
27.6  DF  .~.~.~.~.~.~.~.~ Nitrogen, other than nitro or nitroso, bonded directly to the 6-position of a purine ring system (e.g., adenosine, etc.) {3}
27.7.~.~.~.~.~.~.~.~.~ Chalcogen, halogen, or benzene bonded directly to carbon of the purine ring system (e.g., isoguanosine, 2-fluoroadenosine, etc.)

DEFINITION

Classification: 536/27.7

Chalcogen, halogen, or benzene bonded directly to carbon of the purine ring system (e.g., isoguanosine, 2-fluoroadenosine, etc.):

(under subclass 27.6) Compounds wherein benzene, chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), or halogen is bonded to a carbon of the purine ring system.

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