Acetic Anhydride → HCID 10839053, compound

HRID 2393910Notes

Reaction equation

HRID 2393910 reaction equation
[CH3:1][CH:2]1[CH2:33][O:32][C:5]2([O:9][CH:8]3[CH2:10][CH:11]4[CH:16]5[CH2:17][CH:18]=[C:19]6[CH2:24][CH:23]([O:25][C:26]([CH3:28])=[O:27])[CH2:22][CH2:21][C:20]6([CH3:29])[CH:15]5[CH2:14][CH2:13][C:12]4([CH3:30])[CH:7]3[CH:6]2[CH3:31])[CH2:4][CH2:3]1.[C:34](OC(=O)C)(=[O:36])[CH3:35]>Cl.N1C=CC=CC=1>[CH3:31][C:6]1[C@@H:7]2[C@:12]3([CH3:30])[C@@H:11]([CH2:10][C@@H:8]2[O:9][C:5]=1[CH2:4][CH2:3][C@H:2]([CH2:33][O:32][C:34]([CH3:35])=[O:36])[CH3:1])[C@@H:16]1[CH2:17][CH:18]=[C:19]2[CH2:24][C@@H:23]([O:25][C:26]([CH3:28])=[O:27])[CH2:22][CH2:21][C@:20]2([CH3:29])[C@H:15]1[CH2:14][CH2:13]3

Participants

4

Reactant 2

HCID 7918Acetic AnhydrideHCID 2257681061-54-7

Product 1

HCID 10839053HCID 10839053, compoundYield 84%

Reagents, catalysts & solvents 1

HCID 10176127Pyridinium chlorideCatalyst

Procedure

Another group of workers, Dauben et al have reported a process in which diosgenin acetate is heated in acetic anhydride containing pyridine hydrochloride as catalyst which afforded pseudodiosgenin diacetate in 84% yield. (Ref:Dauben WG and Fonken GJ; J Am Chem Soc, 76, 4618, 1954).

Sources & evidence

ORD record
ord-1c43a812ce7a48b88b52392dd54b2fdd
Source dataset
uspto-grants-1998_09
Patent number
US05808117

Reaction notes

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