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Which sequence of steps describes the be...

Which sequence of steps describes the best synthesis of 2-methyl-3-pentanone ?

A

(1) 1 - Propanol + `(CH_3)_2` CHMgBr , diethyl ether
(2) `H_3O^+`
(3) PCC, `CH_2Cl_2`

B

(1) 1-Propanol + `Na_2Cr_2O_7,H_2SO_4,H_2O` heat
(2) `SOCl_2`
(3) `(CH_3)_2CHCl,AlCl_3`

C

(1) 1- Propanol + PCC, `CH_2Cl_2`
(2) `(CH_3)_2CHLi,` diethyl ether
(3) `H_3O^+`
(4) `Na_2Cr_2O_7,H_2SO_4,H_2O` heat

D

(1) 2 - Propanol + `Na_2Cr_2O_7, H_2SO_4, H_2O,` Heat
(2) `CH_(3)CH_(2)CH_(2)Li,` diethyl ether
(3) `H_3O^+`
(4) PCC, `CH_2Cl_2`

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