Nucleophilic benzoylation using lithiated methyl mandelate as a synthetic equivalent of the benzoyl carbanion. Oxidative decarboxylation of α-hydroxyacids
作者:Gonzalo Blay、Isabel Fernández、Pilar Formentin、Belén Monje、José R Pedro、Rafael Ruiz
DOI:10.1016/s0040-4020(00)01097-8
日期:2001.2
The synthesis of alkyl aryl ketones using lithiated methyl mandelate as a synthetic equivalent of the benzoyl carbanion is reported (Umpolung). The methodology involves alkylation of methyl mandelate, hydrolysis of the ester group and oxidative decarboxylation of the resulting -alpha -hydroxyacids. The last step is carried out in a catalytic aerobic way using a Co(III) complex in the presence of pivalaldehyde under very mild and advantageous conditions. The procedure is also applied to methyl mandelates substituted on the aromatic ring. (C) 2001 Elsevier Science Ltd. All rights reserved.
Catalytic aerobic oxidative decarboxylation of α-hydroxy-acids. Methyl mandelate as a benzoyl anion equivalent
作者:Gonzalo Blay、Isabel Fernández、Pilar Formentin、JoséR. Pedro、Antonio L. Roselló、Rafael Ruiz、Yves Journaux
DOI:10.1016/s0040-4039(98)00482-1
日期:1998.5
The monomeric square-planar cobalt(III) complex of bis-N,N'-disubstituted oxamides catalyses the oxidative decarboxylation of alpha-hydroxy acids with molecular oxygen/pivalaldehyde with very good yields. This reaction offers an interesting alternative in the use of methyl mandelate as a convenient benzoyl anion equivalent. (C) 1998 Elsevier Science Ltd. All rights reserved.
Use of an aqueous composition as rust inhibitor
申请人:NIPPON OIL AND FATS COMPANY, LIMITED
公开号:EP0294649B1
公开(公告)日:1992-02-26
US4888132A
申请人:——
公开号:US4888132A
公开(公告)日:1989-12-19
Nucleophilic Benzoylation Using a Mandelic Acid Dioxolanone as a Synthetic Equivalent of the Benzoyl Carbanion. Oxidative Decarboxylation of α-Hydroxyacids
作者:Gonzalo Blay、Isabel Fernández、Belén Monje、José Pedro
DOI:10.3390/90500365
日期:——
The synthesis of alkyl aryl ketones using a mandelic acid dioxolanone as a syntheticequivalent (Umpolung) of the benzoyl carbanion is reported. The methodology involves alkylation of the mandelic acid dioxolanone, hydrolysis of the dioxolanone moiety in the alkylated products and oxidative decarboxylation of the resulting alpha-hydroxyacids. The last step is carried out in a catalytic aerobic way
报道了使用扁桃酸二氧戊环酮作为苯甲酰基碳负离子的合成等价物 (Umpolung) 合成烷基芳基酮。该方法涉及扁桃酸二氧戊环酮的烷基化、烷基化产物中二氧戊环酮部分的水解和所得α-羟基酸的氧化脱羧。最后一步是在非常温和的条件下,在新戊醛存在下,使用 Co (III) 配合物以催化有氧方式进行的。