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Meaning of Diels–Alder in English:

Diels–Alder

Pronunciation /diːlzˈɔːldə/

noun

Chemistry

Used attributively with reference to a synthetic method involving the addition of a conjugated diene to a compound with a double or triple bond so as to form a six-membered ring; especially in "Diels–Alder reaction." Compare "diene synthesis".

Origin

1930s; earliest use found in Journal of the Chemical Society. From the names of Otto Diels and Kurt Alder, German chemists, who described such reactions in a series of papers beginning in 1928 (Ann. der Chem 460 98–122).