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Allenecarboxylic acids

Allenecarboxylic acid esters reacted with 2 equiv of an aromatic aldehyde at the terminal double bond. The reaction was mediated by trimethylphosphine <20050L1387>. 4-Alkylidene-m-2,6-diaryl-l,3-dioxanes have been obtained in good to excellent yields (Equation 79). [Pg.826]

Under the same conditions, dichlorocarbene underwent addition to the more nucleophilic double bond of the ester of allenecarboxylic acid 11 to give cyclopropane... [Pg.677]

Two-bond proton-nitrogen-15 coupling constants in diazocompounds may be assumed to follow qualitatively trends observed for VC Ca-Ha) in allenes. Such an example is found for C NH) in diazomethane (42) (158) and ethyl diazoacetate (254) (94b). In 254 V( NH) is more positive than in 42, comparable to the situation in allene and allenecarboxylic acid ester. [Pg.441]

Penta-2,3-dienoic acid 3-methyl-l -allenecarboxylic acid) (70) Total electron density 367,368 ... [Pg.464]

Chloro-l, 1,2-trifluorotriethylamine Allenecarboxylic acid fluorides from cyclopropenonecarbinols... [Pg.477]

Trifluoroacetic acid 2(5H)-Furanones from a-allenecarboxylic acids Stereospecific ring closure... [Pg.353]

See other pages where Allenecarboxylic acids is mentioned: [Pg.415]    [Pg.202]    [Pg.559]    [Pg.520]    [Pg.520]    [Pg.520]    [Pg.434]    [Pg.162]    [Pg.251]    [Pg.412]    [Pg.460]    [Pg.267]    [Pg.269]    [Pg.518]    [Pg.146]    [Pg.154]    [Pg.207]    [Pg.418]    [Pg.291]    [Pg.87]    [Pg.218]    [Pg.270]    [Pg.285]    [Pg.290]    [Pg.383]    [Pg.248]    [Pg.191]    [Pg.255]    [Pg.287]   


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Allenecarboxylates

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