相似化合物
73-22-3 13139-14-5 143824-78-6物理性质
- 熔点289-290°C
- 沸点447.9°C at 760 mmHg
- 闪点224.687 °C
- 密度1.1754 (粗估)
- PH:[α]D20 -1~1°(c=1, dil. HCl)
- pKa:2.30±0.10(预测)
- PSA:79.11
- LogP:1.1223
- 折射率1.5200 (估算)
- 溶解性Methanol: Water (7:3): Soluble
- 敏感性Acidic salts, such as L-TRYPTOPHAN, are generally soluble in water. The resulting solutions contain moderate concentrations of hydrogen ions and have pH's of less than 7.0. They react as acids to neutralize bases. These neutralizations generate heat, but less or far less than is generated by neutralization of inorganic acids, inorganic oxoacids, and carboxylic acid. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible. Many of these compounds catalyze organic reactions.
- 外观形态白色至浅米色或淡黄色粉末
- 储存条件请置于阴暗处, 惰性气氛中,室温
- 产品应用营养增补剂,抗氧化剂,可添加明胶,玉米等色氨酸含量少的食品中.与赖氨酸,蛋氨酸,苏氨酸合用于牛肉,米,玉米等,可得最佳效果. DL-色氨酸经旋光折分制得L-色氨酸,是氨基酸输液及综合氨基酸制剂和重要成份,可治疗烟酸缺乏症.作为饲料添加剂,参与动物体内血浆蛋白质的更新,促进核黄素发挥作用,有助于烟酸及血红素的合成,可显著增加怀孕动物胎仔体内抗体,对泌乳期的乳牛和母猪有促进沁乳的作用. 当畜禽缺乏色氨酸时,生长停滞,体重下降,脂肪积累降低,种公畜睾丸萎缩.
- 性质描述白色至黄白色结晶或结晶性粉.熔点275-282°C(293°C),无臭或略有臭味,味略甜.L-型的苦味,D-型的甜度与蔗糖相似.0.2水溶液的pH为5.5-7.0.耐酸,耐光性差.溶于水(25°C时溶解度0.4),稀酸和碱,微溶于乙醇.
欧盟法规
ECHA物质C&L通报REACH预注册上下游产品
α-(hydroxyimino)-β-(indol-3-yl)propionic acid 5-(3-indolylmethylene)hydantoin formylamino-indol-3-ylmethyl-malonic acid acetylamino-indol-3-ylmethyl-malonic acid1-benzyl-β-carboline 1-ethyl-9H-β-carboline 3-MethylindoleN-乙酰-Dl-色氨酸置于水,Sodium Hydroxide体系中,化学反应 1.5H,以23.2 G的收率获得产物dl-色氨酸
参考文献:饲料添加剂dl-色氨酸的制备方法
标题:饲料添加剂dl-色氨酸的制备方法
摘要:本发明提供一种饲料添加剂dl-色氨酸的制备方法,包括以下步骤:1)制备吲哚-3-甲醛;2)制备乙酰甘氨酸;3)制备3-吲哚基-2-乙酰氨基烯丙酸;4)制备n-乙酰色氨酸;5)制备dl-色氨酸.该饲料添加剂dl-色氨酸的制备方法,原料易得且成本低,反应效率高,工艺简单,在常温常压下就可以进行,无环境污染.
海关参考信息
- 2902200000-苯
2905121000-正丙醇
2912110000-甲醛
2912120000-乙醛 - 💡 提示:海关信息按照顺序优先匹配,如需确认的海关信息,请参考相关资料。
- 详情请参考:📖 海关编码查询和海关进出口税则
专利信息
专利号:US-12421534-B2
优先权日:2021-11-10
标 题 :Engineered enzymes and method for the synthesis of diverse tyrosine analogs
发明人:ALMHJELL PATRICK J; ARNOLD FRANCES H
权利人:CALIFORNIA INST OF TECHN
摘要:Provided herein is an engineered tryptophan synthase β-subunit (TrpB) that catalyzes the synthesis of tyrosine, tyrosine analogs, or salts thereof. Also provided herein are methods for preparing tyrosine, tyrosine analogs, or a salt thereof using the engineered TrpB described herein.
专利号:US-6350595-B1
优先权日:1997-10-28
标题:Synthesis of polynucleotides having random sequences
发明人:NEUNER PHILIPPE
权利人:ISTITUTO DI RICERCHE DI MOLECO
摘要:Subject of this invention is a process for the chemical synthesis of polynucleotides having totally or partially random sequences, based on the utilization, as synthesis monomer units for the random sequence part, or presynthesized mononucleotides and dinucleotides. Said synthesis is carried out on separate supports, so that on each of those supports is alternated at least one reaction cycle wherein a mixture of said dinucleotides is bound, with at least one reaction cycle wherein a mononucleotide is bound, and that in a preferred embodiment at the end of the n cycles required for a codon synthesis, the supports are mixed and then redivided into one or more reaction containers. The resulting polynucleotides are such that, for the random sequence part, each trinucleotide unit is fit to match only a limited number of codons, predefined for each unity in number and sequence, and the genetic code degeneracy effects can thus be eliminated. FIG. 1 shows the chemical structure of the dinucleotides utilized as monomer units for the synthesis of codons forming the final sequence.
专利号:WO-9312076-A1
优先权日:1991-12-13
标题:Reagents for automated synthesis of peptide analogs
发明人:WEBB THOMAS ROY
权利人:CORVAS INT INC
摘要:Reagents suitable for synthesis of peptide analogs using automated peptide synthesis and procedures for synthesis of peptide analogs are provided.
专利号:US-2016031800-A1
优先权日:2013-03-14
标 题:Synthesis of chiral kynurenine compounds and intermediates
发明人:TRETYAKOV ALEXANDER; DROUET KEITH E; SANDERS WILLIAM
权利人:VISTAGEN THERAPEUTICS INC
摘要:Provided are methods for the synthesis of compounds including chiral kynurenine compounds, intermediates useful for the synthesis thereof, and related compounds. For example, methods are provided for the synthesis of L-4-chlorokynurenine.
专利号:US-5283293-A
优先权日:1990-12-14
标 题:Reagents for automated synthesis of peptide analogs
发明人:WEBB THOMAS R
权利人:CORVAS INC
摘要:Reagents suitable for synthesis of peptide analogs using automated peptide synthesis and procedures for synthesis of peptide analogs are provided.
专利号:US-10822593-B2
优先权日:2018-02-12
标 题:Alcohol dehydrogenase mutant and application thereof in synthesis of diaryl chiral alcohols
发明人:NI YE; ZHOU JIEYU; XU GUOCHAO; WANG YUE
权利人:UNIV JIANGNAN
摘要:The present disclosure discloses an alcohol dehydrogenase mutant and application thereof in synthesis of diaryl chiral alcohols, and belongs to the technical field of bioengineering. The alcohol dehydrogenase mutant of the present disclosure has excellent catalytic activity and stereoselectivity, and may efficiently catalyze the preparation of a series of chiral diaryl alcohols in R- and S-configurations. By coupling alcohol dehydrogenase of the present disclosure to glucose dehydrogenase or formate dehydrogenase, the synthesis of chiral diaryl alcohol intermediates of various antihistamines may be achieved. Compared with the prior art, a method for preparing diaryl chiral alcohols through asymmetric catalytic reduction using the alcohol dehydrogenase of the present disclosure has the advantages of simple and convenient operation, high substrate concentration, complete reaction and high product purity, and has great industrial application prospects.