What is DIBAL? Give the method of its preparation. Which groups can be reduced using this reagent? Give any three examples of the compound which can be reduced using DIBAL.
DIBAL stands for Diisobutylaluminium hydride, which is a selective reducing agent widely used in organic synthesis. It is represented as ( (i-Bu_2AlH) ) and is known for its ability to reduce esters, nitriles, and other carbonyl derivatives to aldehydes under controlled conditions without further reduction to alcohols. DIBAL is particularly valuable because it ______ _________ ___ _________ _____.
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Giving suitable examples discuss the use of phase transfer catalysts in the following reactions:
(i) Alkylation
(ii) Oxidation
(iii) Heck reaction
(iv) Wittig reaction
(v) Aldol and related reactions
Discuss the disconnections for the synthesis of paracetamol. Also write its scheme of synthesis. Draw the general scheme/mechanism of Stille coupling reaction. Give examples of some additives which are used to increase the rate of these reactions.
) 3-Methylazacyclohexane
Thexylborane
Nitration of benzothiophene
Write the names of the following compounds
[2,2,0] hexa-2,5-diene
(ii) 1,4- cyclohexadiene