1) 2-Hydroxypyrazine
2-羟基吡嗪
3) 2,5-two(2-hydroxy-phenyl) pyrazine
2,5-二(2-羟基苯基)吡嗪
4) 2-hydroxy-methyl-3,5,6-trimethyl-pyrazine
2-羟甲基-3,5,6-三甲基吡嗪
1.
OBJECTIVE To prepare an emulsion of 2-hydroxy-methyl-3,5,6-trimethyl-pyrazine palmitate(HTMPP) ,a prodrug of 2-hydroxy-methyl-3,5,6-trimethyl-pyrazine(HTMP) metabolised from tetramethylpyrazine(TMP) and to expect a longer biological half life of HTMPP than that of TMP.
目的研制2-羟甲基-3,5,6-三甲基吡嗪的前药2-羟甲基-3,5,6-三甲基吡嗪棕榈酸酯静脉乳剂,以期延长川芎嗪的生物半衰期。
5) polyhydroxypyrazine
多羟基吡嗪
1.
At different temperatures, pyrolysis-gas chromatography-mass spectrometry was used to analyse the pyrolysis volatile products of polyhydroxypyrazine in the presence of air.
采用热裂解-气相色谱-质谱联用技术(Py-GC-MS),选择不同温度,在空气存在的条件下对烟叶重要组分多羟基吡嗪进行了热裂解挥发性成分分析,结果表明:该方法具有较好的重复性(相对标准偏差<1。
6) 2-methylpyrazine
2-甲基吡嗪
1.
Study on the synthesis of 2-methylpyrazine;
2-甲基吡嗪的合成工艺改进
2.
The mechanism of 2-cyanopyrazine prepared from 2-methylpyrazine by catalytic ammoxidation was explained qualitatively with the theory of appropriate structure of group.
通过实验得到最优反应条件为:370℃,2-甲基吡嗪、水、氧气、氨气的进料摩尔比为1∶7。
3.
It could be conjectured that 2-methylpyrazine is reacted via a series of dehydrogenations and oxidations to form intermediates pyrazinyl carboxylic acid and pyrazinamide which are then cynadized into 2-cyanopyrazine.
研究2-甲基吡嗪氨氧化催化合成2-氰基吡嗪的催化反应机理后,可知2-甲基吡嗪是通过一系列的脱氢、氧化生成甲醛吡嗪和羧酸吡嗪然后氰化生成产物的,因此优良的催化剂必须由活性及数目合适的脱氢、供[O]及氰化中心组成。
补充资料：2-羟基吡嗪
分子式 C4H4N2O
分子量 95.08
CAS号 6270-63-9
从丙酮中析出的羟基吡嗪熔点为187-188℃。溶于水和醇,不溶于冷的丙酮。
用途;羟基吡嗪主要用于合成磺胺甲氧吡嗪（SMPZ）,也用于合成2-卤代吡嗪和2-氰基吡嗪等药物中间体。
分子量 95.08
CAS号 6270-63-9
从丙酮中析出的羟基吡嗪熔点为187-188℃。溶于水和醇,不溶于冷的丙酮。
用途;羟基吡嗪主要用于合成磺胺甲氧吡嗪（SMPZ）,也用于合成2-卤代吡嗪和2-氰基吡嗪等药物中间体。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条