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2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (or DDQ) is the chemical reagent with formula C 6 Cl 2 (CN) 2 O 2. This oxidant is useful for the dehydrogenation of alcohols, [3] phenols, [4] and steroid ketones. [5] DDQ decomposes in water, but is stable in aqueous mineral acid. [6]
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The use of protective groups is pervasive but not without criticism. [103] In practical terms their use adds two steps (protection-deprotection sequence) to a synthesis, either or both of which can dramatically lower chemical yield. Crucially, added complexity impedes the use of synthetic total synthesis in drug discovery.
Trichloroethyl chloroformate is used in organic synthesis for the introduction of the trichloroethyl chloroformate (Troc) protecting group for amines, thiols and alcohols.It readily cleaves vs other carbamates and can be used in an overall protecting group strategy.
Download as PDF; Printable version; ... (PMB) is used as a ... (DDQ) [18] Conditions for deprotection of benzyl group are applicable for cleavage of the PMB ...
Then a line of hulking excavators moved in, using their hydraulic claws to smash homes into pieces. Within hours, the neighborhood was a ruin. Bimbo Omowole Osobe, a former resident of the Badia East slum who was evicted in 2013 when her neighborhood was demolished, sits in the clinic where she now sleeps at night in the reception area.
The following other wikis use this file: Usage on ar.wikipedia.org ثنائي كلورو ثنائي سيانو بنزوكينون; Usage on ca.wikipedia.org