8,9-Difluoro-3-methyl-6-oxo-2,3-dihydro-6H-1-oxa-3a-aza-phenalene-5-carboxylic acid → HCID 70419397, compound

HRID 580592

Reaction equation

HRID 580592 reaction equation
[F:1][C:2]1[C:3](F)=[C:4]2[O:9][CH2:8][CH:7]([CH3:10])[N:6]3[CH:11]=[C:12]([C:17]([OH:19])=[O:18])[C:13](=[O:16])[C:14]([CH:15]=1)=[C:5]23.[C:21]([O:25][C:26]([NH:28][C@H:29]1[C@@H:33]([CH3:34])[CH2:32][NH:31][CH2:30]1)=[O:27])([CH3:24])([CH3:23])[CH3:22]>CS(C)=O>[C:21]([O:25][C:26]([NH:28][C@H:29]1[C@@H:33]([CH3:34])[CH2:32][N:31]([C:3]2[C:2]([F:1])=[CH:15][C:14]3[C:13](=[O:16])[C:12]([C:17]([OH:19])=[O:18])=[CH:11][N:6]4[CH:7]([CH3:10])[CH2:8][O:9][C:4]=2[C:5]=34)[CH2:30]1)=[O:27])([CH3:24])([CH3:22])[CH3:23]

Participants

4

Reactant 2

HCID 5342788,9-Difluoro-3-methyl-6-oxo-2,3-dihydro-6H-1-oxa-3a-aza-phenalene-5-carboxylic acidHCID 11138119(3S,4S)-3-(Boc-amino)-4-methylpyrrolidine

Product 1

HCID 70419397HCID 70419397, compoundYield 70.7%

Reagents, catalysts & solvents 1

HCID 679Dimethyl SulfoxideSolvent

Procedure

A mixture of 9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de][1,4]benzoxazine-6-carboxylic acid (0.5 g), anhydrous dimethyl sulfoxide (10 ml) and cis-3-t-butoxycarbonylamino-4-methylpyrrolidine (0.54 g) was stirred for 2 hours at 90°-100° C. and then concentrated. To the residue was added methanol and the resulting precipitate was collected by filtration and then washed with cold methanol to give the title compound (0.58 g) as yellowish powder, mp 219°-220° C.

Workup

  1. concentrationconcentrated
  2. additionTo the residue was added methanol
  3. filtrationthe resulting precipitate was collected by filtration
  4. washwashed with cold methanol

Sources & evidence

ORD record
ord-b7f2201273df4e4fa8288ce078d6c38d
Source dataset
uspto-grants-1988_06
Patent number
US04753953

Linked notes

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