Roche Vitamins Inc.

Hoffmann-La Roche Inc.

Jean-Marie Santer

Bruno Burdet

Theodor Siegfried

August Ruttimann

August Ru/ Ttimann

August R Uttimann

Novel processes and intermediates useful for the manufacture of the Wittig ester salts are disclosed. The Wittig ester salts are known as important C.sub.5 building blocks for the manufacture of various polyenecarboxylic acid esters in the field of carotenoid chemistry.

Method for the production of (3-alkoxycarbonyl-2-butenyl)

A processes and intermediates useful for the manufacture of the Wittig ester salts are disclosed. The Wittig ester salts are known as important C.sub.5 building blocks for the manufacture of various polyenecarboxylic acid esters in the field of carotenoid chemistry.

Novel processes and intermediates useful for the manufacture of the Wittig ester salts are disclosed. The Wittig ester salts are known as important CS building blocks for the manufacture of various polyenecarboxylic acid esters in the field of carotenoid chemistry.

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St. Louis, France

Jean-Marie Santer