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.
Intramolecular “Hydroiminiumation and -amidiniumation” of Alkenes: A Convenient, Flexible, and Scalable Route to Cyclic Iminium and Imidazolinium Salts
作者:Rodolphe Jazzar、Jean-Baptiste Bourg、Rian D. Dewhurst、Bruno Donnadieu、Guy Bertrand
DOI:10.1021/jo0703909
日期:2007.4.1
induces ringclosure cleanly and regioselectively via formal “exo” addition of the nitrogen−hydrogen bond to the pendent carbon−carbon double bond, affording the corresponding cyclic aldiminium, dihydroisoquinolinium, and imidazolinium salts. Of special interest, novel 4,4-disubstituted imidazolinium salts are accessible via this synthetic route. Similarly, addition of phosgene to alkenyl ureas and alkenyl