Match column A (coupling reactions) with column B (reagents)
Column-A
Column-B
(1) Suzuki coupling
(I) $\mathrm{H_2C{=}CHCO\,CH}$
(2) Heck coupling
(II) $\mathrm{RB(OH)}$,
(3) Sonagashira coupling
(III) $\mathrm{PhCO(CH)\,ZnI}$
(4) Negeshi coupling
(IV) CHECR
(V) $\mathrm{SnR}$
The correct match is:
(a)I-II, 2-1, 3-IV, 4-III
(b)1-1, 2-V. 3-III, 4-IV
(c)1-IV, 2-III, 3-11, 4-1
(d)1-11.2-111, 3-IV,4-V
Answer
Answer (as printed): A
Explanation
Suzuki coupling — Palladium catalyzed cross coupling between organoboranic acid and halides.Heck coupling — Palladium catalyzed C-C coupling between aryl halides or vinyl halides and activated alkenes in the presence of a base.Sonogashira coupling — This coupling terminal alkynes with aryl or vinyl halides is performed with a palladium catalyst, Cu(I) cocatalyst and amine base.Negishi coupling — This reaction is the organic reaction of an organohalide with an organic-zinc compound Pd and Ni catalyst.