4-acetyl-3-(4-chlorophenyl)-2-methylene-5-oxohexanoic acid methyl ester | 884537-10-4

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 4-acetyl-3-(4-chlorophenyl)-2-methylene-5-oxohexanoic acid methyl ester
• 英文别名: Methyl 4-acetyl-3-(4-chlorophenyl)-2-methylidene-5-oxohexanoate
• CAS: 884537-10-4
• 化学式: C₁₆H₁₇ClO₄
• 分子量: 308.762
• InChiKey: YQBROGBDMQSGTI-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.7
• 重原子数：
  21
• 可旋转键数：
  7
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.31
• 拓扑面积：
  60.4
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  4-acetyl-3-(4-chlorophenyl)-2-methylene-5-oxohexanoic acid methyl ester 在 氢氧化钾 、 sodium hydroxide 、 sodium tetrahydroborate 作用下， 以 甲醇 为溶剂， 反应 6.0h， 生成
  参考文献：
  名称：

  Persistent splenomegaly in an adult female with homozygous sickle cell anemia

  摘要：

  Sickle cell anemia (SCA) is associated with repeated episodes of erythrostasis in the spleen, which lead to thrombosis and infarction of the spleen resulting in "autosplenectomy" which is usually complete by 8 years of age.We present a case of a 22-year-old female who presented with complaints of fever, bone pain and joint swelling. On examination she had pallor, icterus and moderate splenomegaly. Her hemoglobin was 7.5g/dl. Peripheral smear showed many sickled red cells. Slide test for sickling was positive with 2% sodium metabisulphite. Hemoglobin electrophoresis revealed a single band in the hemoglobin S, D, and G region. No band was seen in the HbA & HbA(2) region. HbF level was 0%. USG showed an enlarged spleen with few defined hypoechoeic lesion.We present this case because of rarity of association of homozygous SCA with splenomegaly in this age group, the confusion that echogenic lesions in spleen can create and to emphasize the risk of sequestration crises, which remains in such cases.

  DOI：

  10.1080/01650420500328365
• 作为产物：
  描述：

  2-[(4-氯苯基)-羟基甲基]-丙烯酸甲酯 在 吡啶 、 三乙烯二胺 作用下， 以 四氢呋喃 、 二氯甲烷 为溶剂， 生成 4-acetyl-3-(4-chlorophenyl)-2-methylene-5-oxohexanoic acid methyl ester
  参考文献：
  名称：

  Persistent splenomegaly in an adult female with homozygous sickle cell anemia

  摘要：

  Sickle cell anemia (SCA) is associated with repeated episodes of erythrostasis in the spleen, which lead to thrombosis and infarction of the spleen resulting in "autosplenectomy" which is usually complete by 8 years of age.We present a case of a 22-year-old female who presented with complaints of fever, bone pain and joint swelling. On examination she had pallor, icterus and moderate splenomegaly. Her hemoglobin was 7.5g/dl. Peripheral smear showed many sickled red cells. Slide test for sickling was positive with 2% sodium metabisulphite. Hemoglobin electrophoresis revealed a single band in the hemoglobin S, D, and G region. No band was seen in the HbA & HbA(2) region. HbF level was 0%. USG showed an enlarged spleen with few defined hypoechoeic lesion.We present this case because of rarity of association of homozygous SCA with splenomegaly in this age group, the confusion that echogenic lesions in spleen can create and to emphasize the risk of sequestration crises, which remains in such cases.

  DOI：

  10.1080/01650420500328365

文献信息

• P₂O₅-Promoted Efficient and Diastereoselective Synthesis of Substituted 5-Methylene-dihydropyran-2,6-diones and 3-Methylene-3,4-dihydropyran-2-ones
  作者：Vijay Singh、Sudharshan Madapa、Sanjay Batra

  DOI：10.1080/00397910802028879

  日期：2008.6.20

  A simple, efficient, and diastereoselective synthesis of 5-methylene-dihydropyran-2,6-diones and 3-methylene-3,4-dihydropyran-2-ones from substrates afforded by the S(N)(2) reaction between the acetyl derivatives of the Baylis-Hillman adducts and methylacetoacetate or acetylacetone or benzoyl acetone via saponification followed by P(2)O(5)-mediated cyclization is described.