Cesium carbonate → (6-(5-Carbamoyl-1,3,4-thiadiazol-2-yloxy)-1-hydroxy-4-methyl-1,3-dihydrobenzo[c][1,2]oxaborol-3-yl)methanesulfonic acid

HRID 1798322ノート

反応式

HRID 1798322 の反応式
[OH:1][B:2]1[C:6]2[CH:7]=[C:8]([OH:12])[CH:9]=[C:10]([CH3:11])[C:5]=2[CH:4]([CH2:13][S:14]([O:17]C)(=[O:16])=[O:15])[O:3]1.Cl[C:20]1[S:24][C:23]([C:25]([NH2:27])=[O:26])=[N:22][N:21]=1.C(=O)([O-])[O-].[Cs+].[Cs+]>CN(C=O)C>[C:25]([C:23]1[S:24][C:20]([O:12][C:8]2[CH:9]=[C:10]([CH3:11])[C:5]3[CH:4]([CH2:13][S:14]([OH:17])(=[O:15])=[O:16])[O:3][B:2]([OH:1])[C:6]=3[CH:7]=2)=[N:21][N:22]=1)(=[O:26])[NH2:27]

参加物

5

反応物 3

HCID 10796Cesium carbonateHCID 123487555-Chloro-1,3,4-thiadiazole-2-carboxamideHCID 58292585Methyl (1,6-dihydroxy-4-methyl-1,3-dihydrobenzo[c][1,2]oxaborol-3-yl)methanesulfonate

生成物 1

HCID 58292845(6-(5-Carbamoyl-1,3,4-thiadiazol-2-yloxy)-1-hydroxy-4-methyl-1,3-dihydrobenzo[c][1,2]oxaborol-3-yl)methanesulfonic acid

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

実験手順

To a mixture of methyl (1,6-dihydroxy-4-methyl-1,3-dihydrobenzo[c][1,2]oxaborol-3-yl)methanesulfonate (0.46 g, 1.71 mmol, 1 eq.) and 5-chloro-1,3,4-thiadiazole-2-carboxamide (0.42 g, 2.56 mmol, 1.5 eq.) in 10 ml DMF was added cesium carbonate (2.22 g, 6.82 mmol, 4 eq.) portionwise. The reaction was stirred at room temperature overnight. It was then quenched by water, extracted with EtOAc. The aqueous layer was collected and prep HPLC gave the product as white flakes. 1H NMR (400 MHz, DMSO-d6) δ 8.39 (s, 1H), 8.01 (s, 1H), 7.39 (d, J=2.4 Hz, 1H), 7.27 (d, J=2.4 Hz, 1H), 5.42 (d, 7.6 Hz, 1H), 3.04 (dd, J=14.4, 1.2 Hz, 1H), 2.46 (m, 1H), 2.27 (s, 3H).

後処理

  1. customIt was then quenched by water
  2. extractionextracted with EtOAc
  3. customThe aqueous layer was collected
  4. customprep HPLC gave the product as white flakes

出典と根拠

ORDレコード
ord-74a5c80557dc4d56891db6bf9cc65dc5
出典データセット
uspto-grants-2013_01
特許番号
US08343944B2

反応ノート

読み込み中…