N-bromobutanimide → [1,2]Thiazolo[4,3-d]pyrimidine
反応式
C1C(=O)N(Br)C(=O)C1.N[C:10]1[N:15]=[CH:14][N:13](Cl)[C:12]2=[CH:17][NH:18][S:19][C:11]=12>>[N:18]1[S:19][CH:11]=[C:12]2[C:17]=1[CH:10]=[N:15][CH:14]=[N:13]2参加物
3
実験手順
Reaction of 4,6-dichloro-5-nitropyrimidine with CuCN/NMP gives the 4-nitrile. Reduction of the nitro group to the amine is followed by diazotization/thiation to give the corresponding 5-mercapto compound. Reaction of this with Me3Al/NH4Cl gives the amidine which is oxidatively cyclized with NBS to 7-amino-4-chloroisothiazolo[4,5-d]pyrimidine. Removal of the amino functionality by diazotization/hypophosphorus acid is followed by displacement of the 4-chlorine with an appropriate amine to give the desired isothiazolo[4,3-d]pyrimidine derivatives as shown above.
後処理
- customRemoval of the amino functionality by diazotization/hypophosphorus acid
出典と根拠
- ORDレコード
- ord-12184287a369445f86dd0d4261c6bc64
- 出典データセット
- uspto-grants-2003_02
- 特許番号
- US06521620B1
反応ノート
読み込み中…