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Palmitic Acid → 9-(1,3-Di-n-hexadecanoyloxy-2-propoxymethyl)guanine

HRID 65105
Notes
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Reaction equation

HRID 65105 reaction equation
[OH:1][CH2:2][CH:3]([O:6][CH2:7][N:8]1[CH:16]=[N:15][C:14]2[C:13](=[O:17])[NH:12][C:11]([NH2:18])=[N:10][C:9]1=2)[CH2:4][OH:5].[C:19]([OH:36])(=O)[CH2:20][CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][CH2:26][CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH2:33][CH3:34]>CN(C)C=O>[C:19]([O:1][CH2:2][CH:3]([O:6][CH2:7][N:8]1[CH:16]=[N:15][C:14]2[C:13](=[O:17])[NH:12][C:11]([NH2:18])=[N:10][C:9]1=2)[CH2:4][O:5][C:19](=[O:36])[CH2:20][CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][CH2:26][CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH2:33][CH3:34])(=[O:36])[CH2:20][CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][CH2:26][CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH2:33][CH3:34]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

4

Reactant 2

HCID 985Palmitic AcidHCID 135398740Ganciclovir

Product 1

HCID 1363321569-(1,3-Di-n-hexadecanoyloxy-2-propoxymethyl)guanineYield 97.6%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
50 °C

Procedure

To 50 mg of 9-(1,3-dihydroxy-2-propoxymethyl)guanine in 5 ml of N,N-dimethylformamide were added 290 mg dicyclohexycarbodiimide and 300 mg of n-hexadecanoic acid and the solution was stirred at 50° C. for 50 hours. The compound was then precipitated in ice water. The water was extracted with methylene chloride (3x). The combined methylene chloride extracts were concentrated, then purified on preparative silica gel plates developed in 1:9 methanol:methylene chloride to yield 140 mg 9-(1,3-di-n-hexadecanoyloxy-2-propoxymethyl)guanine, m.p. 150°-154° C.

Workup

  1. customThe compound was then precipitated in ice water
  2. extractionThe water was extracted with methylene chloride (3x)
  3. concentrationThe combined methylene chloride extracts were concentrated
  4. custompurified on preparative silica gel plates

Sources & evidence

ORD record
ord-12d72320893d464589daebde79908be2
Source dataset
uspto-grants-1986_09
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US04612314

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes