成人免费xx,国产又黄又湿又刺激不卡网站,成人性视频app菠萝网站,色天天天天

Welcome to chemicalbook!
Chinese English Japanese Germany Korea
400-158-6606
Try our best to find the right business for you.
Do not miss inquiry messages Please log in to view all inquiry messages.

Welcome back!

ChemicalBook CAS DataBase List 2-[3-(DIMETHYLAMINO)-1-METHOXY-2-PROPENYLIDENE]MALONONITRILE
95689-38-6

2-[3-(DIMETHYLAMINO)-1-METHOXY-2-PROPENYLIDENE]MALONONITRILE synthesis

5synthesis methods
4637-24-5 Synthesis
N,N-Dimethylformamide dimethyl acetal

4637-24-5
602 suppliers
$5.00/25g

5417-82-3 Synthesis
(1-ETHOXYETHYLIDENE)MALONONITRILE

5417-82-3
118 suppliers
$9.00/1g

Propanedinitrile, 2-[3-(dimethylamino)-1-ethoxy-2-propen-1-ylidene]-

98645-41-1
1 suppliers
inquiry

-

Yield:-

Reaction Conditions:

at 100; for 1 h;

Steps:

41.41A
Example 41 A; 2-(3-dimethylamino-l-ethoxyallylidene)malononitrile:; 2-(l-ethoxyethylidene)malono-nitrile (110.0 g, 808 mmol) was dissolved in TV, /V- dimethylformamide dimethyl acetal (94%, 230 mL, 1.62 mol), and the reaction mixture was heated to reflux at 100 0C for 1 hr. Cooled down to room temperature. Solid was collected, and washed with cold methanol to give an orange solid product. The mother liquor was concentrated, and the solid was collected again, and washed with cold methanol. This procedure was repeated couple of times, and all the solid products were combined. The final residue was purified by a short column chromatography (SiO2, ethyl acetate). The combined yield of the reaction is 78% (120.0 g) as a mixture of 2-(3-dimethylamino-l-ethoxy- allylidene)malononitrile (73.5%) and 2-(3-dimethylamino-l-methoxyallylidene)malono- nitrile (26.5%). EPO 2-(3-dimethylamino-l-ethoxyallylidene)malononitrile: 1H NMR (CDCl3, 300 MHz): δ = 7.47 ppm (d, J= 12.6 Hz, IH); 5.16 (d, J= 12.6 Hz, IH); 4.43 (q, J= 7.1 Hz, 2H), 3.19 (s, br. 3H), 2.94 (s, br. 3H), 1.41 (t, J= 7.1 Hz, 3H). MS (ESI, M+l): 192.1. 2-(3-dimethylamino-l-metlioxyallylidene)malononitrile: 1H NMR (CDCl3, 300 MHz): δ = 7.51 ppm (d, J= 12.9 Hz, IH); 5.10 (d, J= 12.9 Hz, IH); 4.11 (s, 3H), 3.19 (s, br. 3H), 2.94 (s, br. 3H). MS (ESI, M+l): 178.0.

References:

ABBOTT LABORATORIES WO2006/81072, 2006, A1 Location in patent:Page/Page column 47-48

2-[3-(DIMETHYLAMINO)-1-METHOXY-2-PROPENYLIDENE]MALONONITRILE Related Search: