US PATENT SUBCLASS 549 / 376
.~.~.~.~.~.~ Preparing by reacting an aldehyde with a compound containing acyclic carbon to carbon unsaturation

Current as of: June, 1999
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549 /   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) {2}
200  DF  .~.~ Oxygen containing hetero ring (e.g., dioxirane, etc.) {16}
356  DF  .~.~.~ The hetero ring is six-membered {9}
357  DF  .~.~.~.~ Plural ring oxygens in the hetero ring (e.g., 1,2-dioxin, etc.) {4}
369  DF  .~.~.~.~.~ The ring oxygens are in the 1,3-positions of the hetero ring (e.g., 1,3 dioxane, etc.) {6}
376.~.~.~.~.~.~ Preparing by reacting an aldehyde with a compound containing acyclic carbon to carbon unsaturation

DEFINITION

Classification: 549/376

(under subclass 369) Processes in which an aldehyde is reacted with a compound containing acyclic carbon to carbon unsaturation to prepare a 1,3-dioxane compound.

(1) Note. This subclass provides for processes such as the preparation of 4,4-dimethyl-1,3-dioxane from isobutylene and formaldehyde, etc. [figure]