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-[2-(2-methoxyethoxy)ethoxy]-ethanethiol
31521-83-2

2-[2-(2-methoxyethoxy)ethoxy]-ethanethiol synthesis

9synthesis methods
Toluene-4-sulfonic acid 2-[2-(2-methoxyethoxy)-ethoxy]-ethyl ester (2.7) (10.8 g, 34 mmol) and thiourea (2.6 g, 34 mmol) were dissolved in a mixture of absolute EtOH (20 mL) and H2O (14 mL) and the mixture was refluxed for 3h. 4N NaOH solution (10 mL) was added to mixture and the reaction mixture refluxed 2 more h. The reaction mixture was concentrated under reduced pressure to ~ 10 mL, diluted with distilled H2O (10 mL) and neutralized with concentrated HCl. The solution was extracted with CH2Cl2 (3x10mL) and the solvent was evaporated under reduced pressure. The pink-yellow liquid was distilled at 0.45 torr pressure. The product was collected as a clear liquid and obtained in 54% yield. B.p. 55-57 °C at 0.45 torr. GC-MS Calcd. C7H16O3S+ : 180.0; found: 179.9. 1 H NMR (250 MHz, CDCl3) δ 3.6(6H), 3.5(4H), 3.4(3H), 2.7(2H), 1.6(1H); 13 C NMR (300 MHz, CDCl3) δ 76.92, 73.30, 72.34, 70.98, 70.63, 59.46, 24.66
-

Yield:-

Steps:

Multi-step reaction with 2 steps
1: N,N-dimethyl-formamide / 16 h / 90 °C / Inert atmosphere
2: hydrogenchloride / methanol; water / 2.5 h / 100 °C

References:

Keddie, Daniel J.;Grande, John B.;Gonzaga, Ferdinand;Brook, Michael A.;Dargaville, Tim R. [Organic Letters,2011,vol. 13,# 22,p. 6006 - 6009]

2-[2-(2-methoxyethoxy)ethoxy]-ethanethiol Related Search: