Convert of following :

Explanation

(a) The preparation of `beta-hydroxy` ester from a carbonyl compound suggests the use of Reformatskly reaction product.

(b) The product consists of isopropyl and aldehyde groups. Aldehyde group may be obtained by partial oxidation of `1^@` alcohol by using `PCC` or reduced `Cu` at `570 K`.
Isobutanol (`1^@` alcohol) may be obtained by the reaction of `HCHO` with
Reactions :

( c)
The product contains two more `C` atoms than the reactant. This suggests the use of two `C` atom `G.R`.,
Reactions :

(d)
First, convert `MeCHO` to by using `EtMgBr`, then convert `MeCH(OH) Et` into `G.R` and introduce `(-COOH)` group by `CO_2`.

Since the allyl halides are reactive, they undergo double decomposition with `G.R`.
Reactions :