US PATENT SUBCLASS 558 / 309
.~.~.~ Hetero ring containing reactant

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {21}
303  DF  .~ Nitriles (i.e., compounds having cyano bonded directly to carbon, which carbon may be single bonded to any atom but may be multiple bonded only to carbon) {21}
308  DF  .~.~ Processes for forming the cyano group {7}
309.~.~.~ Hetero ring containing reactant {1}
310  DF  .~.~.~.~> Nitrogen, or oxygen, and carbonyl carbon are adjacent ring members of the hetero ring (e.g., lactams, lactones, etc.)

DEFINITION

Classification: 558/309

(under subclass 308) Processes wherein there is utilized a hetero ring containing reactant.

(1) Note. Examples of precesses provided for herein are: (a) the preparation of 1-cyano-1, 3-butadiene by the dehydration of tetrahydrofuramide, and (b) the preparation of isobutyronitrile and methacyrlonitrile by the high temperature, chromia gel catalyzed reaction of ammonia and isobutylene oxide.