天堂网亚洲,天天操天天搞,91视频高清,菠萝蜜视频在线观看入口,美女视频性感美女视频,95丝袜美女视频国产,超高清美女视频图片

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 Des(N'-Methyl-2-nitro-1,1-ethenediaMino) N'-Methylureido Nizatidine
82586-81-0

Des(N'-Methyl-2-nitro-1,1-ethenediaMino) N'-Methylureido Nizatidine synthesis

1synthesis methods
-

Yield:-

Reaction Conditions:

in acetonitrile;

Steps:

6 Preparation of N-methyl-N'-2-(2-dimethylaminomethyl-4-thiazolylmethylthio)ethylthiourea

Following the above reaction sequence, a solution of 0.93 g of 2-(2-dimethylaminomethyl-4-thiazolylmethylthio)ethylamine in 10 ml. of anhydrous acetonitrile was prepared. A solution of 0.22 ml. of methyl isocyanate in 5 ml. of anhydrous acetonitrile was added thereto. The reaction was stirred at ambient temperature for about 2.5 hours at which time the solvent was removed by evaporation. The resulting residue slowly crystallized and was recrystallized from cylcohexane to yield about 0.97 g of N-methyl-N'-2-(2-dimethylaminomethyl-4-thiazolylmethylthio)ethylurea melting at about 56°-59° C. Analysis: calculated: C, 45.81; H, 6.99; N, 19.42; O, 5.55. found: C, 46.03; H, 6.66; N, 19.41; O, 5.71.

References:

US4382090,1983,A

Des(N'-Methyl-2-nitro-1,1-ethenediaMino) N'-Methylureido Nizatidine Related Search: