由苯合成间溴苯乙酸

等等，马上就好

先用酸性高锰酸钾氧化成苯甲酸，再与Br2~FeBr3反应，由于羧基是间位取代基，故生成间溴苯甲酸，反应机理为亲电取代再用氢化铝理还原为间溴苯甲醇，反应过程分两部，第一步是氢负离子的亲核酰基取代，生成间溴苯甲醛第二步是氢负离子的亲核加成，生成间溴苯甲醇，在与HBr溶液反应成间溴溴甲苯，接着将其与My在乙醚中反应生成格式试剂，反应机理为自由基反应，最后将格式试剂与CO2反应，即可生成间溴苯乙酸，反应机理为亲核加成（CO2可看成两个羰基，可与格式试剂发生亲核加成）。更详细的步骤与过程可参考北大版《基础有机化学》第三版上册（邢其毅主编）。

4 - (2 '(1' .3 '- dioxane E. Central - ethyl) benzene lithium borate

4,5 - difluoro of indole

4 - trifluoromethyl methoxy-benzonitrile

4 - trifluoromethyl benzene borate

4 - methoxy-2 - nitroaniline

4 --2 - Dinitrotoluene

4 - hydroxymethyl -5 - methyl -2 - phenyl oxazolidine

4 - Nitro -3 - acetaminophen - trifluoromethyl benzene

4 - Nitro -3 --- trifluoromethyl benzene

4 - bromine -5 - fluoride -2 - Dinitrotoluene

4 - iodine benzenesulfonyl chloride

4 - sodium iodobenzene

5 - oxidation of methyl indole

5 - Oxygen indole -2 - carboxylate

5 - Chlorine 2 - 4-anisidine

5 - chlorine -2 - methoxy-bromophenyl

5 - chlorine -2 - fluorophenyl carbonitrile

5 - chlorine indole

5 - chlorine indole -2 - carboxylic acid ethyl

5 - cyano-2 - fluorophenyl formaldehyde

5 - nitro-indole -2 - carboxylate

5 - nitro-indole -2 - carboxylic acid ethyl

6 - fluoride pyridine -2 - carboxylate

6 - chlorine -3 - fluoride -2 - methylpyridine

6 - chlorine indole -2 - carboxylic acid ethyl

L-tyrosine tert-Butyl

N-(2 - chlorine -5 - methyl) pyridyl phthalimide

N-(3 - fluoride -4 - Nitro) benzyl MORPHOLINO

N-methyl - N-(2 - chlorine -4 - amino)-piperazine

N-methyl - N-(2 - chlorine -4 - nitro-phenyl)-piperazine

Glycol shrink -5 - fluoro-4 - Hydroxy-3 - Nitro E aldehyde

Trifluoromethyl acetyl-acetonitrile

Pyruvic acid p-chlorophenyl hydrazone

Right - (1,3 - Central E-dioxane) Bromobenzene

P acetanilide

The dinitrophenylhydrazine

The dinitrophenylhydrazine

Ethyl 4-nitrophenyl hydrazone

Esters of nitrobenzene hydrazone

Of Bromoxynil

The formylphenyl phenyl methacrylate

Pharmaceutical intermediates directory:

Indole -2 - carboxylic acid ethyl

O hydroxymethyl benzene borate

O-phenyl acid aldehyde

Inter-ethoxy-pentyl酰aniline

Inter-ethoxy-pentyl酰aniline

Inter-pyridyl-phenyl sulfone A sulfonate

Inter-pentyl aroylamino phenyl acid pentyl ester

Inter-pentyl phenyl acid amide

Toluene between bromine

Inter-bromophenyl B cyanide

Inter-bromo phenylacetate

Inter-p-Bromobenzylbromide

Thiophenyl acetonitrile

Diazotization on fluoride

Sylvite

O-allyl two carbamoyl tertiary amine

B．乙醛中含-CHO，则乙醛发生氧化反应一步转化为乙酸，故B不选；

C．卤代烃发生消去反应生成烯烃，则溴乙烷在NaOH/醇中加热一步转化为乙烯，故C不选；

C．苯与液溴反应生成溴苯，可发生取代反应一步转化，故D不选；

故选A．