Substituted 3-hydroxy-delta-lactones from epoxides
申请人:Coates Geoffrey W.
公开号:US20100145046A1
公开(公告)日:2010-06-10
Catalysts and methods for the carbonylation of epoxides to substituted 3-hydroxy-δ-lactones and β-lactones are disclosed.
揭示了用于将环氧化合物羰基化为取代的3-羟基-δ-内酯和β-内酯的催化剂和方法。
SUBSTITUTED 3-HYDROXY-DELTA-LACTONES FROM EPOXIDES
申请人:Cornell University
公开号:US20140107339A1
公开(公告)日:2014-04-17
Catalysts and methods for the carbonylation of epoxides to substituted 3-hydroxy-δ-lactones and β-lactones are disclosed.
本发明揭示了催化剂和方法,用于将环氧化合物羰基化为取代的3-羟基-δ-内酯和β-内酯。
Method for producing lactones from a strain of Aureobasidium pullulans
申请人:CHARABOT
公开号:US10196659B2
公开(公告)日:2019-02-05
The invention relates to a method for producing lactones from a strain of Aureobasidium pullulans that are produced from a pre-culture of the Aureobasidium pullulans strain CBS 771.97, obtained from CBS-KNAW Fungal Biodiversity Center, Uppsalalaan 8, 3584 CT Utrecht, Netherlands, or related strains; from an inoculum obtained from the pre-culture; a culture is produced by fermentation at a temperature between 20° C. and 40° C. over a period of at least 3 days so as to produce metabolites, in a sterilized aqueous production medium containing: a carbon source; a nitrogen source; a mineral salt solution; and a calcium source, at a concentration between 2 and 100 mM; and following the fermentation period, converting the metabolites produced into a lactone mixture comprising (R)-5,6-dihydro-6-pentyl-2H-pyran-2-one (or (R)-(−)-massoia lactone) and/or (4R,6R)-4-hydroxy-6-pentyl-tetrahydro-2H-pyran-2-one.
Carbonylation of Epoxides to Substituted 3-Hydroxy-δ-Lactones
作者:John W. Kramer、Daniel Y. Joh、Geoffrey W. Coates
DOI:10.1021/ol702475e
日期:2007.12.1
Substituted 3-hydroxy-delta-lactones (3HLs) are valuable intermediates in the synthesis of pharmaceuticals and other biologically active-natural products. Herein we report the first example of the catalytic carbonylation of substituted homoglycidols to 3HLs using HCo(CO)(4). Upon optimization of the catalyst and reaction conditions, a functionally diverse set of 3HLs was prepared. Mechanistic insight was gained by observation of the carbonylation reaction using in situ IR spectroscopy, and we propose a mechanism that is consistent with previously studied epoxide carbonylation systems.
PROCÉDÉ DE PRODUCTION DE LACTONES A PARTIR D'UNE SOUCHE D'AUREOBASIDIUM PULLULANS