3-Amino-4-pyrazole carbosamide hemisulfate

Pakati peiyo synthesis yeallopurinol.

Iyo ndeimwe ye3-amino-4-inotsiva pyrazole akatevedzana.Inogona kushandiswa sepakati pekugadzira mishonga yakawanda yemishonga inobudirira, yakadai seallopurinol, imwe yepyrazolopyrimidine derivatives series, iyo yekupedzisira kubvira 1963 Kubva pakushandiswa kwayo kwekliniki, ndiyo yave iri mushonga mukuru wekurapa gout.Parizvino, kune nzira shoma dzinozivikanwa dzekugadzira

3-aminopyrazole-4-carboxamide hemisulfate muChina, kunyanya nekuita malononitrile uye triethyl orthoformate kugadzirira ethoxymethylene malononitrile, uyezve neThe reaction ye hydrazine hydrate inobereka 3-amino-4-cyanopyrazole, iyo inozopedzisira yaitwa ne concentrated acid kuti ibudise sulfuric acid.

3-aminopyrazole-4-carboxamide hemisulfate (Chen Huiru, Xiao Guomin et al. 3-aminopyrazole- Synthesis of 4-formamide hemisulfate [J]. Chemical Industry Times, 2008, 6 (22): 39 40), goho rose re synthesis nenzira iyi inenge 60% (yakaverengwa semalononitrile), nzira iyi Inosanganisira maitiro matatu-nhanho, matanho akareba, uye reagents inoshandiswa, yakadai semalononitrile uye ethoxymethylene malononitrile, inowedzera chepfu uye inodhura.Mukuwedzera, iyo 3-aminopyrazole-4 yakagadzirirwa nenzira iyi -Formamide hemisulfate ine ruvara rwakaoma kubvisa uye inoda kushandiswa kwekuwedzera, iyo inonyanya kuoma.

Kune mishumo mumabhuku ekunze anoshandisa pyridylamide hydrazone uye ethoxymethylene malononitrile seyakagadzirwa kuti iwane 3-amino-4-cyanopyrazole nekuwedzera uye cyclization, uye wobva waita neconcentrated sulfuric acid kuti uwane iyo yakanangwa compound (Reuken G Jones. activemethylene compounds [J] J Am Chem Soc. 1952,74(5) :4889 4891).Iyo mikuru yemidziyo inoshandiswa mune iyi nzira inodhura, maitiro ekuita goho haana kukwirira, uye purofiti yekugadzirwa kwemaindasitiri yakaderera.Zvinofanira kunge zvakaoma.