Hydrochloric Acid → 6,9-Dihydroxy-8-methylene-14-oxa-1,11-diazatetracyclo[7.4.1.02,7.010,12]tetradeca-2,4,6-triene-4-carbaldehyde

HRID 1252427Notes

Reaction equation

C(=O)(O[CH2:4][CH:5]1[C:17]2([OH:19])[O:18][N:12]([CH2:13][CH:14]3[CH:16]2[NH:15]3)[C:11]2[C:6]1=[C:7]([OH:22])[CH:8]=[C:9]([CH:20]=[O:21])[CH:10]=2)N.Cl>[OH-].[Na+]>[OH:22][C:7]1[CH:8]=[C:9]([CH:20]=[O:21])[CH:10]=[C:11]2[C:6]=1[C:5](=[CH2:4])[C:17]1([OH:19])[O:18][N:12]2[CH2:13][CH:14]2[CH:16]1[NH:15]2

Participants

Conditions

Temperature: 50 °C

Procedure

4-Formyl-6,9-dihydroxy-14-oxa-1,11-diazatetracyclo[7.4.1.02,7.010,12 ]tetradeca-2,4,6-trien-8-ylmethyl carbamate (40 mg) was dissolved in 1N aqueous sodium hydroxide (4 ml) and the solution was heated at 50° C. for 100 minutes under argon atmosphere. The reaction mixture was cooled and neutralized with 1N aqueous hydrochloric acid (4 ml) and the resultant aqueous solution was lyophilized. The residue was subjected to a silica gel column chromatography and elution was carried out with a mixture of methanol and chloroform (1:4, v/v). The desired fractions were combined and then evaporated to dryness in vacuo to give 6,9-dihydroxy-8-methylene-14-oxa-1,11-diazatetracyclo[7.4.1.02,7.010,12 ]tetradeca-2,4,6-triene-4-carbaldehyde (23 mg).

Workup

temperatureThe reaction mixture was cooled
washThe residue was subjected to a silica gel column chromatography and elution
additionwas carried out with a mixture of methanol and chloroform (1:4, v/v)
customevaporated to dryness in vacuo

Sources & evidence

ORD record: ord-6814a658f66b40db8620dfb2d53e86df
Source dataset: uspto-grants-1988_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04743555

Reaction notes

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