N-methyl-methylthio-2-nitroethenarnine is synthesized when MeNO2,CS2,anhydrous EtOH,KOH,CH3NH2,(CH3)2SO4 are used as raw materials and through the condensation-aminoation-methylation in the experiment.In aminoation an...N-methyl-methylthio-2-nitroethenarnine is synthesized when MeNO2,CS2,anhydrous EtOH,KOH,CH3NH2,(CH3)2SO4 are used as raw materials and through the condensation-aminoation-methylation in the experiment.In aminoation and methylation progresses,water is used as solvent and substituted traditional organic solvent.Using the new technics not only lower the cost of production,but also eliminate solvent pollution.The overall yield of the produc is 40.5%.展开更多
目的探讨3-甲基巴豆酰辅酶A羧化酶缺乏症(3-methylcrotonyl-coenzyme A carboxylase deficiency,MCCD)患儿的临床及遗传学特征。方法回顾性分析2018年1月-2023年10月就诊于郑州大学附属儿童医院的6例MCCD患儿的临床表现及基因检测结果...目的探讨3-甲基巴豆酰辅酶A羧化酶缺乏症(3-methylcrotonyl-coenzyme A carboxylase deficiency,MCCD)患儿的临床及遗传学特征。方法回顾性分析2018年1月-2023年10月就诊于郑州大学附属儿童医院的6例MCCD患儿的临床表现及基因检测结果。结果6例MCCD患儿中,男性4例,女性2例,平均就诊年龄为7 d,平均确诊年龄为45 d。1例小便气味异常,5例无临床症状。6例患儿血3-羟基异戊酰肉碱、尿3-羟基异戊酸、3-甲基巴豆酰甘氨酸均增高,5例伴游离肉碱降低。共检出MCCC1基因变异6个:c.1630del(p.R544Dfs*2)、c.269A>G(p.D90G)、c.1609T>A(p.F537I)、c.639+2T>A、c.761+1G>T、c.1331G>A(p.R444H),以及MCCC2基因变异3个:c.838G>T(p.D280Y)、c.592C>T(p.Q198*,366)、c.1342G>A(p.G448A),其中MCCC1基因c.269A>G(p.D90G)、c.1609T>A(p.F537I)未见文献报道。1例为母源性MCCD,患儿携带来自母亲的一个杂合变异。5例伴游离肉碱降低患儿予补充左卡尼汀,末次随访时游离肉碱均恢复至正常水平。结论MCCC1基因c.269A>G(p.D90G)、c.1609T>A(p.F537I)为新发现的变异,丰富了MCCC1基因变异谱。血氨基酸及酰基肉碱谱和尿有机酸谱联合基因检测有助于MCCD早期诊断和治疗,并为遗传咨询提供参考。展开更多
文摘N-methyl-methylthio-2-nitroethenarnine is synthesized when MeNO2,CS2,anhydrous EtOH,KOH,CH3NH2,(CH3)2SO4 are used as raw materials and through the condensation-aminoation-methylation in the experiment.In aminoation and methylation progresses,water is used as solvent and substituted traditional organic solvent.Using the new technics not only lower the cost of production,but also eliminate solvent pollution.The overall yield of the produc is 40.5%.