1-diphenylphosphonio-1-methoxymethyllithium, a useful reagent for the synthesis of aldehydes from hindered ketones
作者:E.J. Corey、Marcus A. Tius
DOI:10.1016/0040-4039(80)80227-9
日期:1980.1
A new reagent, 1-diphenylphosphonio-1-methoxymethyllithium, has been found to be highly effective for the transformation R2CO → R2CHCHO with sterically hindered, enolizable ketones.
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.
N-arylshydroxyalkylidene-carboxamide compositions and methods
申请人:Wei T. Edward
公开号:US20070155755A1
公开(公告)日:2007-07-05
N-(Substituted-aryl-hydroxyalkylidene)-cycloalkyl carboxamide compositions are disclosed that target molecular elements on sensory nerves. These compounds, preferably administered topically, inhibit the perception of itch and pain and have prolonged duration of action.
N-Arylshydroxyalkylidene carboxamide compositions and methods
申请人:Wei T. Edward
公开号:US20080118558A1
公开(公告)日:2008-05-22
N-(Substituted-aryl-hydroxyalkylidene)-cycloalkyl carboxamide compositions are disclosed that target molecular elements on sensory nerves. These compounds, preferably administered topically, inhibit the perception of itch and pain and have prolonged duration of action.