Which sequence of step describes the best synthesis of 2 - methyl-3- pentaneous ?
A. (1) 1- Propanol `+ (CH_(3))_(2) CHMgBr`, diethyl ether
(2) `H_(3)O^(+)`
(3) `PC C, CH_(2)Cl_(2)`
B. (1) 1-Propanol `+ Na_(2)Cr_(2)O_(7), H_(2)SO_(4), H_(2)O`, heat
(2) `SOCl_(2)`
(3) `(CH_(3))_(2)CHCl, AlCl_(3)`
C. (1) 1-Propanol `+ PC C, CH_(2)Cl_(2)`
(2) `(CH_(3))_(2)CHLi`, diethyl ether
(3) `H_(3)O^(+)`
(4) `Na_(2)Cr_(2)O_(7), H_(2)SO_(4), H_(2)O`, heat
D. (1) 2-Propanol `+ Na_(2)Cr_(2)O_(7), H_(2)SO_(4), H_(2)O`, heat
(2) `CH_(3)CH_(2)CH_(2)Li`, diethyl ether
(3) `H_(3)O^(+)`
(4) `PC C, CH_(2)Cl_(2)`
