O. Isler, H. Gutmann, M. Montavon
1957
Citations
1
Influential Citations
298
Citations
Quality indicators
Journal
Helvetica Chimica Acta
Abstract
A simple and efficient synthesis of norbixin and crocetin diesters is described following the schemes C2 + C2o + C2,=C24 and C3 + C14 + C3 = C20 respectively. By means of the Wittig reaction crocetin di-aldehyde is condensed with a bromoacetic acid ester and a C14-dialdehyde with an α-bromopropionic acid ester. The intermediate tri- phenylphosphorane compounds are crystalline and easily isolated in a pure state.