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 METHYL 2-AMINO-4-THIAZOLEACETATE
64987-16-2

METHYL 2-AMINO-4-THIAZOLEACETATE synthesis

3synthesis methods
-

Yield: 93%

Reaction Conditions:

Stage #1:methanol;2-amino-4-thiazoleacetic acid with sulfuric acid in methanol at 0;Reflux;
Stage #2: with sodium hydrogencarbonate; pH=8 - 9

Steps:

1.1 Preparation of methyl (2-amino-1,3-thiazol-4-yl)acetate
Preparation of methyl(2-amino-1,3-thiazol-4-yl)acetate To a solution of 2-amino-4-thiazole acetic acid (20 g, 0.126 mol) in methanol (100 ml) was added concentrated H2SO4 (24 ml) dropwise at 0-5° C. and the reaction mixture was refluxed for 5 hours. Subsequently the reaction mixture was basified to pH of 8-9 with NaHCO3 solution, to give a colorless precipitate, which was filtered and dried to afford the title compound in 19.5 g (93% yield).

References:

Srinivas, Akella Satya Surya Visweswara;Mathiyazhagan, Kasinathan;Sharada, Duddu Savaraiah;Ponpandian, Thanasekaran;Revathy, Kulasekharan;Reddy, Gaddam Om;Kamarai, Mani;Raiagopal, Sriram US2010/152188, 2010, A1 Location in patent:Page/Page column 6

METHYL 2-AMINO-4-THIAZOLEACETATE Related Search: