发明授权
US5681977A Method for the production of (3-alkoxycarbonyl-2-butenyl) triphenylphosphonium salts 失效
(3-烷氧基羰基-2-丁烯基)三苯基鏻盐的制备方法

Method for the production of (3-alkoxycarbonyl-2-butenyl)
triphenylphosphonium salts
摘要:
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.
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