1,1'-methanediyl-bis-imidazolidin-2-one | 13311-64-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑烷类
• 英文名称: 1,1'-methanediyl-bis-imidazolidin-2-one
• 英文别名: 1,1'-Methandiyl-bis-imidazolidin-2-on；methylenebis(ethyleneurea)；1-[(2-Oxoimidazolidin-1-yl)methyl]imidazolidin-2-one
• CAS: 13311-64-3
• 化学式: C₇H₁₂N₄O₂
• 分子量: 184.198
• InChiKey: OYJDFNFZIOOALB-UHFFFAOYSA-N

物化性质

• 熔点：
  181-185 °C(Solv: methanol (67-56-1))
• 沸点：
  590.6±20.0 °C(Predicted)
• 密度：
  1.332±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  -1.5
• 重原子数：
  13
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.71
• 拓扑面积：
  64.7
• 氢给体数：
  2
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  聚合甲醛 、 1,1'-methanediyl-bis-imidazolidin-2-one 在 aqueous solution 作用下， 生成 3,3'-bis-hydroxymethyl-1,1'-methanediyl-bis-imidazolidin-2-one
  参考文献：
  名称：

  Methylene-bis-2-imidazolidones

  摘要：

  公开号：

  US02613210A1
• 作为产物：
  描述：

  2-咪唑烷酮 、 聚合甲醛 在 甲酸 作用下， 生成 1,1'-methanediyl-bis-imidazolidin-2-one
  参考文献：
  名称：

  Methylene-bis-2-imidazolidones

  摘要：

  公开号：

  US02613210A1

文献信息

• A quantitative method for analysis of mixtures of homologues and stereoisomers of hemicucurbiturils that allows us to follow their formation and stability
  作者：Maria Fomitšenko、Anna Peterson、Indrek Reile、Hang Cong、Sandra Kaabel、Elena Prigorchenko、Ivar Järving、Riina Aav

  DOI：10.1039/c6nj03050e

  日期：——

  quantitative analysis of hemicucurbit[6]uril, (all-R,R)-cyclohexanohemicucurbit[6]uril, (all-R,S)-cyclohexanohemicucurbit[6]uril and (all-R,R)-cyclohexanohemicucurbit[8]uril. The applicability of the developed quantitative analysis is demonstrated by the estimation of the reaction yields of cyclohexanohemicucurbiturils and by following the depolymerisation of hemicucurbit[6]uril under acidic conditions. Analysis

  Hemicucurbiturils是一子组的葫芦[内的大环化合物的Ñ ]脲家族。未取代和取代的半葫芦脲形成主体-客体复合物的能力允许阴离子的选择性结合，在催化中的应用和对映体客人之间的手性区分。在这里，我们证明了通过反相HPLC分离半葫芦丝同系物和非对映异构体，并对半葫芦丝[6] uril，（all- R，R）-环己血半curbit [6] uril ，（all- R，S）-环己香半胱氨酸[6]进行了定量分析] uril和（all- R，R）-cyclohexanohemicucurbit [8]尿。已开发的定量分析的适用性通过估计环己半嘧啶脲的反应收率以及在酸性条件下对半嘧啶[6]脲进行解聚来证明。对所研究的化合物（单体，低聚物和大环化合物）的分析表明，重复单元的数量与紫外线消光系数不成正比；同样，与它的线性异构体相比，大环的紫外线吸收率高10倍。在定量其他类别的聚合物大环化合物时，还应
• Method to accelerate biodegradation of aliphatic-aromatic co-polyesters by enzymatic treatment
  申请人：Nagarajan Vasantha

  公开号：US20050261465A1

  公开（公告）日：2005-11-24

  Provided is a method for accelerating the biodegradation of aliphatic-aromatic co-polyesters comprising greater than 60 mol percent aromatic acid, based on total diacid in the co-polyester. The method involves contacting at least one hydrolytic enzyme in aqueous solution to the co-polyester.

  本发明提供了一种加速脂肪族-芳香族共聚多酯生物降解的方法，根据共聚多酯中的二酸总量，该共聚多酯中芳香族酸的含量大于 60 摩尔%。该方法包括将水溶液中的至少一种水解酶与共聚酯接触。
• Clinical Characteristics and Six-Month Outcomes of Nursing Home Residents With Low Activities of Daily Living Dependency
  作者：A. Buttar、C. Blaum、B. Fries

  DOI：10.1093/gerona/56.5.m292

  日期：2001.5.1

  Background. Up to 30% of nursing home residents have very little dependency in activities of daily living (ADLs). We compared the characteristics and six-month outcomes of a sample of low-ADL-dependent nursing home residents (LDR) with other residents.Methods. This is a cross-sectional, six-month follow-up study using secondary data analysis. We combined the separate 1990 and 1993 cohorts in the Resident Assessment Instrument evaluation study. In each case these data were collected in the same 254 nursing homes in 10 states. We studied residents with a length of stay greater than 60 days and age 65 years and older (N = 3955). We compared the baseline characteristics of LDR (n = 985) with all other residents. We then compared six-month outcomes of LDR with other residents and characteristics of LDR with poor outcomes (death or worsened ADL disability) with LDR who remained stable.Results. The LDR had a significantly decreased frequency of geriatric syndromes (i.e., cognitive impairment, urinary incontinence, under-nutrition, vision problems, poor balance, and pressure ulcers) and neurological disease but had the same frequency of non-neurological chronic diseases and were on more medications. Thirty-one percent had poor six-month outcomes associated with baseline poor cognition, incontinence, poor appetite, and presence of vascular disease, daily pain, shortness of breath, and multiple medications.Conclusion. Our research identified 29% of nursing home residents with higher physical function (LDR) who had fewer geriatric syndromes and neurological disease diagnoses; 69% of these remained stable at 6 months. Those LDR with a higher risk of poor outcomes could be prospectively identified. LDR who remained stable for 6 months may represent a group who could potentially be maintained in the community.
• Method to enhance biodegradation of sulfonated aliphatic-aromatic co-polyesters by addition of a microbial consortium
  申请人：Bramucci Michael

  公开号：US20060177930A1

  公开（公告）日：2006-08-10

  A microbial consortium for the biodegradation of sulfonated aliphatic-aromatic co-polyesters having greater than 60 mol percent aromatic acid content based on the total acid content of the co-polyester, created by applying selective pressure. Methods to biodegrade sulfonated aliphatic-aromatic co-polyesters using microbial consortium SPDC-1 are provided.
• Epoxy hardener systems based on aminomethylene-ethyleneureas
  申请人：Schile D. Richard

  公开号：US20070179257A1

  公开（公告）日：2007-08-02

  An epoxy-hardener system is provided having relatively long latency periods combined with relatively short cure times at low cure temperatures. The hardeners of the present invention are ureidoamines and their derivatives, which are chelates of ureido compounds and amines. The ureidoamines are prepared by reacting an amine with the ureido compound and aqueous formaldehyde without a catalyst. Complexes of ureidoamine hardeners with various blocking agents are prepared in the melt. The hardener is prevented from curing the epoxy by the reaction between the hardener and the blocking agent. The blocked hardener is then blended with the epoxy, usually by warming the mixture briefly at about 50-60 degrees C.