Using the reagent list, identify the reagents needed for the three-step synthesis below. Note: there is a Grignard reagent involved. It will help if you worla backward.: HO Step 1 Step 2 Step 3 A Moving to another question will save this response.
Reactive Intermediates
In chemistry, reactive intermediates are termed as short-lived, highly reactive atoms with high energy. They rapidly transform into stable particles during a chemical reaction. In specific cases, by means of matrix isolation and at low-temperature reactive intermediates can be isolated.
Hydride Shift
A hydride shift is a rearrangement of a hydrogen atom in a carbocation that occurs to make the molecule more stable. In organic chemistry, rearrangement of the carbocation is very easily seen. This rearrangement can be because of the movement of a carbocation to attain stability in the compound. Such structural reorganization movement is called a shift within molecules. After the shifting of carbocation over the different carbon then they form structural isomers of the previous existing molecule.
Vinylic Carbocation
A carbocation where the positive charge is on the alkene carbon is known as the vinyl carbocation or vinyl cation. The empirical formula for vinyl cation is C2H3+. In the vinyl carbocation, the positive charge is on the carbon atom with the double bond therefore it is sp hybridized. It is known to be a part of various reactions, for example, electrophilic addition of alkynes and solvolysis as well. It plays the role of a reactive intermediate in these reactions.
Cycloheptatrienyl Cation
It is an aromatic carbocation having a general formula, [C7 H7]+. It is also known as the aromatic tropylium ion. Its name is derived from the molecule tropine, which is a seven membered carbon atom ring. Cycloheptatriene or tropylidene was first synthesized from tropine.
Stability of Vinyl Carbocation
Carbocations are positively charged carbon atoms. It is also known as a carbonium ion.
![Using the reagent list, identify the reagents needed for the three-step synthesis below. Note: there is a Grignard reagent involved. It will help if you work
backward..:
OH
HO.
Step 1
Step 2
, Step 3
A Moving to another question will save this response.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbc96294a-6867-4c53-8945-7b1c26d22cf9%2F02ece7f9-9b41-4d81-aacd-acf73bfa1e31%2F5uarj58_processed.jpeg&w=3840&q=75)
![Alkyl Halides (X = CI, Br or I) :
CH3X
A
B
D
E
F
G
Alcohols
OH
HO
HO
CH3OH
HO
OH
AA
BB
DD
ЕЕ
FF
GG
Ketones, Aldehydes and Epoxides: Assume "then H,0" is included if a protonation step is needed
H,
Ph
Ph
Ph
J
K
M
P
Other reagents
21 SOCI2, pyridine
22 TSCI, pyridine
23 Mg, Et20
24 MeMgBr, then H20
25 EtMgBr, then H20
26 PhMgBr, then H20
27 PhCH2MgBr, then H20
1 H30* (dilute H2SO4)
11 PCC in CH2CI2
12 Na,Cr,07, H2SO4, H2O
13 BH3•THF or 9-BBN, then H2O2, NaOH
14 Hg(OAc)2, H20, then NABH4
15 O3, then Zn, HCI or DMS
16 MCPBA or CH3CO3H
17 Br2, light
2 conc. H,SO4, heat
3 NaOEt
4 t-BUOK
5 Н2, Pt
6 H2, Lindlar's catalyst
7 Na, NH3
8 LAH or xs LAH, then H2O
9 NaBH4, CH3ОН
18 HBr
19 HBr, ROOR
20 PB13](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbc96294a-6867-4c53-8945-7b1c26d22cf9%2F02ece7f9-9b41-4d81-aacd-acf73bfa1e31%2Fpha5j1_processed.jpeg&w=3840&q=75)
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