US PATENT SUBCLASS 570 / 215
.~.~.~ Diels-Alder reaction

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
101  DF  .~ HALOGEN CONTAINING {21}
214  DF  .~.~ Ring formation, ring expansion or contraction or bonding one alicyclic ring directly or indirectly to another alicyclic ring {1}
215.~.~.~ Diels-Alder reaction

DEFINITION

Classification: 570/215

Diels-alder reaction:

(under subclass 214) Process wherein a conjugated diene is reacted with carbon to carbon unsaturation to produce a new six member carbocyclic ring, e.g., see struture below. [figure]

(1) Note. Either the conjugated diene or the unsaturated compound may already be part of a carbocyclic ring, in which case, a polycyclo compound results. Also, a triple bond may be employed instead of a double bond, in which case, an additional double bond will be found in the product.