Further Utilization of Mucohalic Acids: Palladium-Free, Regioselective Etherification and Amination of α,β-Dihalo γ-Methoxycarbonyloxy and γ-Acetoxy Butenolides
摘要:
[GRAPHICS]Palladium-free etherification and amination of mucohalic acid methyl carbonates le (3,4-dichloro-5-methoxycarbonyloxy-5H-furan-2-one) and 1f (3,4-dibromo-5-methoxycarbonyloxy-5H-furan-2-one) and mucochloric acid acetate 1h (3,4-dichloro-5-acetoxy-5H-furan-2-one) was achieved to afford gamma-functionalized alpha,beta-unsaturated gamma-butyrolactones in good to excellent yield.
[EN] PREPARATION OF SUBSTITUTED BUTENOLIDES VIA PALLADIUM-FREE ETHERIFICATION AND AMINATION OF MASKED MUCOHALIC ACIDS<br/>[FR] PREPARATION DE BUTENOLIDES SUBSTITUES PAR ETHERIFICATION SANS PALLADIUM ET AMINATION D'ACIDES MUCOHALIQUES MASQUES
申请人:WARNER LAMBERT CO
公开号:WO2005026141A2
公开(公告)日:2005-03-24
Methods and materials for preparing 4-substituted-2-buten-4-olidos are disclosed. The methods include reacting a masked mucohalic acid with a primary or secondary amine or with an arylol in the presence of a base. Unlike existing processes, the disclosed methods do not require the use of palladium, which make them well suited for preparing intermediates in drug syntheses.
Further Utilization of Mucohalic Acids: Palladium-Free, Regioselective Etherification and Amination of α,β-Dihalo γ-Methoxycarbonyloxy and γ-Acetoxy Butenolides
作者:Peter G. Blazecka、Daniel Belmont、Tim Curran、Derek Pflum、Ji Zhang
DOI:10.1021/ol035994n
日期:2003.12.1
[GRAPHICS]Palladium-free etherification and amination of mucohalic acid methyl carbonates le (3,4-dichloro-5-methoxycarbonyloxy-5H-furan-2-one) and 1f (3,4-dibromo-5-methoxycarbonyloxy-5H-furan-2-one) and mucochloric acid acetate 1h (3,4-dichloro-5-acetoxy-5H-furan-2-one) was achieved to afford gamma-functionalized alpha,beta-unsaturated gamma-butyrolactones in good to excellent yield.
Preparation of substituted butenolides via palladium-free etherification and amination of masked mucohalic acids
申请人:Blazecka Garth Peter
公开号:US20050059831A1
公开(公告)日:2005-03-17
Methods and materials for preparing 4-substituted-2-buten-4-olides are disclosed. The methods include reacting a masked mucohalic acid with a primary or secondary amine or with an arylol in the presence of a base. Unlike existing processes, the disclosed methods do not require the use of palladium, which make them well suited for preparing intermediates in drug syntheses.