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Sodium Formate → 4-Chloro-2-formylamino-6-methyl-10,10-dioxo-10,11-dihydro-5-oxa-10lambda*6*-thia-dibenzo[a,d]cycloheptene-8-carboxylic acid isopropyl ester

HRID 1173353
Notes
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Reaction equation

HRID 1173353 reaction equation
[CH:1]([O-])=[O:2].[Na+].[CH:5]([O:8][C:9]([C:11]1[CH:12]=[C:13]([CH3:30])[C:14]2[O:20][C:19]3[C:21]([Cl:26])=[CH:22][C:23]([NH2:25])=[CH:24][C:18]=3[CH2:17][S:16](=[O:28])(=[O:27])[C:15]=2[CH:29]=1)=[O:10])([CH3:7])[CH3:6].COC(C1C=C(C)C2OC3C(Cl)=CC(N)=CC=3CS(=O)(=O)C=2C=1)=O>C(O)=O>[CH:5]([O:8][C:9]([C:11]1[CH:12]=[C:13]([CH3:30])[C:14]2[O:20][C:19]3[C:21]([Cl:26])=[CH:22][C:23]([NH:25][CH:1]=[O:2])=[CH:24][C:18]=3[CH2:17][S:16](=[O:28])(=[O:27])[C:15]=2[CH:29]=1)=[O:10])([CH3:7])[CH3:6]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 2723810Sodium FormateHCID 115596902-Amino-4-chloro-6-methyl-10,10-dioxo-10,11-dihydro-5-oxa-10lambda *6*-thia-dibenzo[a,d]cycloheptene-8-carboxylic acid methyl esterHCID 1317285272-Amino-4-chloro-6-methyl-10,10-dioxo-10,11-dihydro-5-oxa-10lambda*6*-thia-dibenzo[a,d]cycloheptene-8-carboxylic acid isopropyl ester

Product 1

HCID 115536024-Chloro-2-formylamino-6-methyl-10,10-dioxo-10,11-dihydro-5-oxa-10lambda*6*-thia-dibenzo[a,d]cycloheptene-8-carboxylic acid isopropyl ester

Reagents, catalysts & solvents 1

HCID 284Formic AcidSolvent

Procedure

Sodium formate (0.040 g, 0.581 mmol) was added to a suspension of 2-amino-4-chloro-6-methyl-10,10-dioxo-10,11-dihydro-5-oxa-10lambda*6*-thia-dibenzo[a,d]cycloheptene-8-carboxylic acid isopropyl ester (0.23 g, 0.581 mmol) [prepared by hydrolysis of compound of Example 1 and followed by esterification using isopropanol/H2SO4] in formic acid (20 mL) and refluxed for 1.5 h. The reaction mixture was cooled and poured into ice water (100 mL). The solid precipitated was filtered, washed with water and dried. The crude product was crystallised with ethylacetate/pet. ether 60-80° C. to obtain the title compound. Yield: 0.12 g (48%); mp: 212-215° C.; 1H NMR (DMSO-d6, 300 MHz): δ 1.30 (d, 6H, OCH(CH3)2, 2.64 (s, 3H, CH3), 5.12 (m, 1H, OCH(CH3)2), 5.25 (s, 2H, CH2, trans minor isomer), 5.32 (s, 2H, CH2, cis major isomer), 7.33 (d, 1H, Ar, trans minor isomer), 7.50 (d, 1H, Ar, trans minor isomer), 7.69 (d, 1H, Ar, cis major isomer), 7.86 (d, 1H, Ar, cis major isomer), 8.10 (s, 1H, Ar), 8.15 (s, 1H, Ar), 8.30 (s, 1H, CHO, cis major isomer), 8.80 (d, 1H, CHO, trans minor isomer), 10.40 (d, 1H, NH, trans minor isomer), 10.57 (s, 1H, NH, cis major isomer); MS: m/e (ES−) 422 (M−1); analysis: C19H18ClNO6S requires C, 53.84; H, 4.28; N, 3.30; Cl, 8.36; S, 7.56. found: C, 54.27; H, 4.45; N, 2.94; Cl, 8.76; S, 7.77%.

Workup

  1. temperaturerefluxed for 1.5 h
  2. temperatureThe reaction mixture was cooled
  3. customThe solid precipitated
  4. filtrationwas filtered
  5. washwashed with water
  6. customdried
  7. customThe crude product was crystallised with ethylacetate/pet. ether 60-80° C.

Sources & evidence

ORD record
ord-74d540fe271d44f28c74fbca5d5135f8
Source dataset
uspto-grants-2010_11
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07834052B2

Reaction notes

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