For example, either the HI produced or excess MeI can react with imidazole or 1-methylimidazole (Scheme 14). The resulting salts formed are impurities and are also resistant to methylation. In spite of these limitations the reaction has found considerable utility in the synthesis of 1-substituted...
Likewise, those amines with secondary amine groups (spermine, spermidine, dimethylamine pyrrolidine, etc.) can also react with nitrous acid and its salts to form nitrosamines, which are compounds with a carcinogenic, mutagenic, and teratogenic capacity (Glória et al., 1997; Scanlan et al., 1982...
The halonitroacetates (I) react with ammonia, methylamine or hydrazine (II) to give the ammonium nitronates (III) of the corresponding halonitroacetic amides (IV).doi:10.1002/chin.198707146YURTANOV, A. I.MARTYNOV, I. V.WILEY‐VCH Verlag GmbHCheminform...
adissolving chitosan in 2% aqueous acetic acid solution and therefore[translate] abetween that of natural rubber and chitosan. An enhancement in[translate] ablend. The increase in resistivity may be due to the enhancement in[translate] athe anhydride groups will react with the amine groups of chi...
On the other hand, the hydroxyl group of hemiaminal also reacted with excess sulfuryl chloride to give dichloride when more than 1.0 equiv of sulfuryl chloride was used, and the chloride at the C20 position was readily hydrolysed to convert back to 28. Next, we had to develop a new ...
Topic: Amine and Heterocyclic reaction (Read 12437 times) CH3CH2NH2 + CH3CO-O-COCH3 --> CH3CH2-NH-COCH3 + CH3COOH Question: explain why only one amine hydrogen which is get substituted by acetyl group eventhough acetate anhydride is used excessively in the reaction??
Fat acid can react with organic amine to produce soap that is used as main surface active for preparing micro-emulsified gasoline. 利用脂肪酸和有机胺反应生成的皂做主表面活性剂制备微乳汽油。 lib.cqvip.com 5. The determination of a minute amount of organic amine in extractant 萃取剂中微量有机...
or by the action of aminoguanidine bicarbonate and formic acid, and then heating and cyclization; or guanidine nitrate can be used as a raw material, first reacting with acetic acid at a temperature of 5-15 ℃ 8h, and then react with oxalic acid, and finally obtained by circling and reflu...
amide, indicating that the planar configuration of thesp2carbon centre reduced the steric hindrance around the N9 amino group. Furthermore, the use of carbodiimide derivatives for the direct formation of guanidine did not proceed and only CbzNCS as a small and reactive reagent reacted with the st...
9 RegisterLog in Sign up with one click: Facebook Twitter Google Share on Facebook Also found in:Encyclopedia,Wikipedia. (Chem.)a colorless, inflammable, alkaline gas, CH3.NH2, having an ammoniacal, fishy odor. It is produced artificially, and also occurs naturally in herring brine and other...