Select the best combination of reagents which will bring the following conversion.

Question

Select the best combination of reagents which will bring the following conversion. <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/e5000e7bf28011e1cf367f9ae485647a-.png" /> (A) CH 3 Cl / AlCl 3 ; KMnO 4 ; CH 3 Cl / AlCl 3 ; NBS / hv LiAlH 4 / H 2 O ; NaOH (B) CH 3 COCl / AlCl 3 ; Br 2 / FeBr 3 ; NaBH 4 / CH 3 OH (C) Br 2 / FeBr 3 ; HNO 3 / H 2 SO 4 ; NaOH ; H 2 / Pt (D) CH 3 Cl / AlCl 3 ; HNO 3 / H 2 SO 4 ; NBS / hv / NaOH

Tardigrade Admin · Accepted Answer

Since, the product is meta, so first step is the insertion of a meta directing group. Since, all the inserted groups are o/p except CH 3 COCl (in case of which other reagents are not suitable) so we than oxidized the group introduced in step (i) to -COOH, which is meta directing.

Q. Select the best combination of reagents which will bring the following conversion.

$C H_{3} Cl / A lC l_{3}; K M n O_{4}; C H_{3} Cl / A lC l_{3}; NBS / h vL i A l H_{4} / H_{2} O; N a O H$

$C H_{3} COCl / A lC l_{3}; B r_{2} / F e B r_{3}; N a B H_{4} / C H_{3} O H$

$B r_{2} / F e B r_{3}; H N O_{3} / H_{2} S O_{4}; N a O H; H_{2} / Pt$

$C H_{3} Cl / A lC l_{3}; H N O_{3} / H_{2} S O_{4}; NBS / h v / N a O H$

Since, the product is meta, so first step is the insertion of a meta directing group. Since, all the inserted groups are o/p except $C H_{3} COCl$ (in case of which other reagents are not suitable) so we than oxidized the group introduced in step (i) to $- COO H$ , which is meta directing.

Q. Select the best combination of reagents which will bring the following conversion.

CH3​Cl/AlCl3​;KMnO4​;CH3​Cl/AlCl3​;NBS/hvLiAlH4​/H2​O;NaOH

CH3​COCl/AlCl3​;Br2​/FeBr3​;NaBH4​/CH3​OH

Br2​/FeBr3​;HNO3​/H2​SO4​;NaOH;H2​/Pt

CH3​Cl/AlCl3​;HNO3​/H2​SO4​;NBS/hv/NaOH

Since, the product is meta, so first step is the insertion of a meta directing group. Since, all the inserted groups are o/p except CH3​COCl (in case of which other reagents are not suitable) so we than oxidized the group introduced in step (i) to −COOH, which is meta directing.

$C H_{3} Cl / A lC l_{3}; K M n O_{4}; C H_{3} Cl / A lC l_{3}; NBS / h vL i A l H_{4} / H_{2} O; N a O H$

$C H_{3} COCl / A lC l_{3}; B r_{2} / F e B r_{3}; N a B H_{4} / C H_{3} O H$

$B r_{2} / F e B r_{3}; H N O_{3} / H_{2} S O_{4}; N a O H; H_{2} / Pt$

$C H_{3} Cl / A lC l_{3}; H N O_{3} / H_{2} S O_{4}; NBS / h v / N a O H$

Since, the product is meta, so first step is the insertion of a meta directing group. Since, all the inserted groups are o/p except $C H_{3} COCl$ (in case of which other reagents are not suitable) so we than oxidized the group introduced in step (i) to $- COO H$ , which is meta directing.