Some Substituted Crotonolactones and Oxazolones

Smith, Walter T.; Hanna, Calvin

doi:10.1021/ja01149a543

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From Phenylpyruvic Acid2

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1964

1986

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Cited by 3 publications

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“…This appears to be a satisfactory general method for the synthesis of these compounds (30,31,135,139,150). Instead of aromatic aldehydes, phthalic anhydride may be used to give the corresponding phthalidenebutenolides (31,318). It was observed that when ethyl /3-benzoylpropionate was treated with benzaldehyde in the presence of sodium ethoxide, /3-benzoyl-/3-benzylidenepropionic acid (XXXI) was O O…”

Section: From Phenylpyruvic Acidmentioning

confidence: 99%

“…A modification of this procedure is the use of the free /3-aroylpropionic acid, rather than its salt. This variation has developed into the general method for preparing a-arylidene-y-phenyl-A^-butenolides (70, 71, 104,107-109,134, 300,318). It has been observed that acetophenone, benzophenone, and other ketones fail to react under these conditions (105,202).…”

Section: From Phenylpyruvic Acidmentioning

confidence: 99%

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