PROCESS FOR MAKING NEO-ENRICHED p-MENTHANE COMPOUNDS
申请人:Erman Mark B.
公开号:US20120116113A1
公开(公告)日:2012-05-10
A process for making neo-enriched p-menthane intermediates is disclosed. Lewis acid-catalyzed rearrangement of an oxaspiro compound provides an aldehyde mixture comprising normal (II) and neo (III) p-menthane-3-aldehydes:
with the neo aldehyde (III) as the major product. The aldehyde mixture is readily oxidized to provide the corresponding carboxylic acids, and the acids are easily converted to a host of neo-enriched p-menthane esters or amides. The esters and amides are valuable as physiological coolants.
Process for making neo-enriched p-menthane compounds
申请人:Renessenz LLC
公开号:EP2450337A3
公开(公告)日:2014-06-18
A process for making neo-enriched p-menthane intermediates is disclosed. Lewis acid-catalyzed rearrangement of an oxaspiro compound provides an aldehyde mixture comprising normal (II) and neo (III) p-menthane-3-aldehydes:
with the neo aldehyde (III) as the major product. The aldehyde mixture is readily oxidized to provide the corresponding carboxylic acids, and the acids are easily converted to a host of neo-enriched p-menthane esters or amides. The esters and amides are valuable as physiological coolants.
INTERCONVERSION BETWEEN ISOMERIC P-MENTHANE-3-CARBOXYLIC ACIDS
申请人:Erman Mark B.
公开号:US20120283469A1
公开(公告)日:2012-11-08
A process for interconversion between WS-1 and neo-WS-1 by heating to a temperature in a range of from 60 degrees Celsius to 250 degrees Celsius. The heating can be done in the presence of an acid catalyst. Starting from practically pure (=98%) WS-1, or mixtures of WS-1 and neo-WS-1, practically pure (=98%) neo-WS-1 can be obtained. Starting from practically pure (=98%) neo-WS-1, or mixtures of WS-1 and neo-WS-1, practically pure (=98%) WS-1 can be obtained.