| 释义 |
Wittig Chem.|ˈvɪtɪç, -ɪg|
The name of Georg Friedrich Karl Wittig (b. 1897), German chemist, used attrib. to designate various synthetic techniques introduced by him, as Wittig reaction, a method for the preparation of substituted alkenes utilizing the action of an alkyl phosphorus ylide on a carbonyl compound (aldehyde or ketone); Wittig rearrangement, the conversion of benzyl or allyl ethers in the presence of a strong base to the corresponding secondary or tertiary alcohol.
1951Jrnl Amer. Chem. Soc. LXXIII. 1437 The Wittig rearrangement of benzyl ethers by lithium phenyl. 1956Chem. Abstr. L. 6443 The previous attempt to prep. a model vitamin D triene by the Wittig reaction..has been continued. 1974Gill & Willis Pericyclic Reactions vi. 195 This elegant experiment proved that the migration involves a supra-supra interaction in Wittig rearrangements. 1979Sci. Amer. Dec. 74/1 Vitamin A is synthesized industrially using the Wittig reaction. 1980Chem. in Brit. XVI. 466/3 Vitamin A acetate is produced industrially via the Wittig synthesis. |