Cyanamide → 4H,6H,7H-pyrano(4,3-d)(1,3)thiazol-2-amine

反応式

[O:1]1[CH2:6][CH2:5][C:4](=O)[CH2:3][CH2:2]1.N1CCCC1.O.C1(C)C=CC([S:20](O)(=O)=O)=CC=1.[S].[N:26]#[C:27][NH2:28]>>[N:26]1[C:4]2[CH2:3][CH2:2][O:1][CH2:6][C:5]=2[S:20][C:27]=1[NH2:28]

参加物

反応物 5

HCID 9864Cyanamide

HCID 31268Pyrrolidine

HCID 121599Tetrahydro-4H-pyran-4-one

HCID 521998p-Toluenesulfonic acid monohydrate

HCID 5362487Sulfur

生成物 1

HCID 222244484H,6H,7H-pyrano(4,3-d)(1,3)thiazol-2-amine

実験手順

Commercially available dihydro-2H-pyran-4(3H)-one (Aldrich), pyrrolidine (Aldrich), p-toluenesulfonic acid monohydrate (Aldrich) sulfur (Aldrich) and cyanamide (Aldrich) were processed using the method described in Example 240A to afford the title compound. MS (ESI+) m/z 157 (M+H)+.