H-Pyrazole-3-carboxylic acid 4-bromo-1 5-dimethyl-（CAS# 5775-91-7)

Hoʻolauna

ʻO ka ʻakika, 4-bromo-1, 5-dimethanol-he mea hoʻohui nona ke kinikini C7H8BrNO2.

ʻAno:

1. Keʻano: acid, 4-bromo-1,5-dimethyl-white solid.

2. Ka helu heheʻe: Aia ka helu heheʻe o ka hui ma waena o 128-130 ° C.

3. Solubility: Hiki ke hoʻoheheʻe ʻia i loko o kekahi mau mea hoʻoheheʻe kūlohelohe, e like me ka ethanol a me ka dichloromethane, akā hiki ʻole ke hoʻoheheʻe ʻia i ka wai.

E hoʻohana:

ʻO ka waikawa, 4-bromo-1,5-dimethyl-ua loaʻa kekahi waiwai noi i ka synthesis organik, a ua hoʻohana nui ʻia e kūkulu i ka iwi o nā molekala organik a alakaʻi i nā hopena. Hiki ke hoʻohana ʻia ma ke ʻano he waena no ka synthesis o nā pesticides, pharmaceuticals a me nā mea hoʻonaninani.

Kaʻina hoʻomākaukau:

ʻakika, 4-bromo-1,5-dimethyl-hiki ke synthesized e nā ʻanuʻu aʻe:

1. ʻO ka mea mua, hoʻopili ʻia ka methyl methacrylate a me ka aniline ma lalo o ka catalysis o ka alkali e hoʻomākaukau ai i ka 1,5-dimethyl-1H-pyrazole.

2. Hoʻopili ʻia ka 1,5-dimethyl -1H-pyrazole me ka hydrogen bromide i mua o ka ʻakika acetic e hana ai i ka 4-bromo-1, 5-dimethyl -1H-pyrazole.

3. ʻO ka hope, ua hoʻopili ʻia ka 4-bromo-1, 5-dimethyl-1H-pyrazole me ka sodium hydroxide a i ʻole ka sodium carbonate e hoʻohua ai i ka waikawa, 4-bromo-1,5-dimethy-.

ʻIke palekana:

E pili ana i ka palekana o ka waikawa, 4-bromo-1,5-dimethyl-, pono e ʻike ʻia nā mea aʻe:

1. hiki i ka hui ke hoʻonāukiuki i nā maka, ka ʻili a me ka ʻōnaehana hanu, e ʻoluʻolu e pale i ka pilina pololei.

2. I ka wā e hoʻohana ai, e pale i ka hoʻohu ʻana i ka lepo a i ʻole ka mahu o ka hopena.

3. I ka wā o ka hana a me ka mālama ʻana, pono e lawe ʻia ka ea maikaʻi a me nā hana pale pilikino, e like me ke komo ʻana i nā aniani pale, nā mīkina lima a me nā lole pale kūpono.

4. Inā pili ʻoe i kēia pūhui, holoi koke i ka wahi i hoʻopilikia ʻia me ka wai nui a nīnau i kāu kauka.

No ka ʻike wale nō kēia ʻike. E ʻoluʻolu e heluhelu a hahai i ka pepa ʻikepili palekana o ke kemika kūpono ma mua o ka hoʻohana ʻana.