How do you synthesize cyclohexanecarboxylic acid?

Question

I can only start from these "things" (1-2 of the following) cyclohexylmagnesium chloride, phenylmagnesium bromide, acetone, benzaldehyde, ethyl magnesium bromide and CO2. (1 or none of the following, H2O, EtOH, Et2O) and one or none of the following, H2SO4, HCl, MCPBA, AlCl3, BH3, Br2, NaBH4, PCC, OsO4, KOH, LDA, HNO3, SOCl2, NaOMe or H2Cr2O7. And all I can do is add heat I can't dry anything. (it's part of lab homework but the lab is on a CD rom so those are the only choices it allows me so that's all I can use.)

Answer 1

I would take cyclohexanol (cheap, and common), then react it with HBr, making bromocyclohexane, and dry it.

Then I would make a grignard reagent from it (with Mg in ether),

and react it with dry ice (CO2), makig the acid.

Answer 2

Actually

I would take cyclohexanol (cheap, and common), then react it with HBr, making bromocyclohexane, and dry it.

Then I would make a grignard reagent from it (with Mg in ether),

and react it with dry ice (CO2), makig the acid.