(2R,3R)-3-(2,4-Difluorophenyl)-3,4-epoxy-2-methylbutanoic acid | 166948-48-7

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 苯丙酸
• 英文名称: (2R,3R)-3-(2,4-Difluorophenyl)-3,4-epoxy-2-methylbutanoic acid
• 英文别名: (2R,3R)-3-[3-(2,4-difluorophenyl)-3,4-epoxy-2-methyl]butanoic acid；(2R)-2-[(2R)-2-(2,4-difluorophenyl)oxiran-2-yl]propanoic acid
• CAS: 166948-48-7
• 化学式: C₁₁H₁₀F₂O₃
• 分子量: 228.195
• InChiKey: DHVQDBCRFYZAIZ-UPONEAKYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.5
• 重原子数：
  16
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.36
• 拓扑面积：
  49.8
• 氢给体数：
  1
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  1H-1,2,4-三唑 、 (2R,3R)-3-(2,4-Difluorophenyl)-3,4-epoxy-2-methylbutanoic acid 以 N,N-二甲基甲酰胺 、 mineral oil 为溶剂， 生成 (alphaR,betaR)-beta-(2,4-二氟苯基)-beta-羟基-alpha-甲基-1H-1,2,4-三唑-1-丁酸
  参考文献：
  名称：

  Orally active azole derivatives

  摘要：

  本发明涉及具有抗真菌活性的新口服活性唑类衍生物，其化学式为I 其中：X为CH或N；Ar代表用卤素和/或三氟甲基取代的苯基；Z为--C(=O)--或--SO.sub.2--；R.sub.1为CN、CO.sub.2 H、CO.sub.2 R.sub.7、CONR.sub.8 R.sub.9或CH.sub.2Y，然后R.sub.3为氢，或R.sub.1与R.sub.3一起形成化学式I'的环 其中B为O、羟基或氢；R.sub.4为C.sub.1-4烷基；R.sub.5、R.sub.6、R.sub.8和R.sub.9为氢或C.sub.1-4烷基；Y为--OH、--OR.sub.7、--OC(=O)R.sub.7、--NR.sub.8 R.sub.9、--NHC(=O)OR.sub.7；R.sub.7为C.sub.1-C.sub.4-烷基、苯基-C.sub.1-C.sub.4-烷基或可选择取代的苯基；当Z为--C(=O)--时，R.sub.2为可选择取代的苯基或萘基；当Z为--SO.sub.2--时，R.sub.2为C.sub.1-4烷基、苯基-C.sub.1-4-烷基或可选择取代的苯基。

  公开号：

  US05478826A1
• 作为产物：
  描述：

  2-氯-2',4'-二氟苯乙酮 在 bis(acetylacetonate)nickel(II) lithium hydroxide 、 双氧水 、 diethylzinc 作用下， 以 四氢呋喃 、 正己烷 、 二氯甲烷 为溶剂， 反应 0.5h， 生成 (2R,3R)-3-(2,4-Difluorophenyl)-3,4-epoxy-2-methylbutanoic acid
  参考文献：
  名称：

  埃文斯手性酰亚胺与苯乙酮的不对称锌-Reformatsky反应及其在立体选择性合成三唑类抗真菌剂中的应用

  摘要：

  研究了Evans手性酰亚胺与各种苯乙酮的Ni（acac）2催化ZnEt 2介导的不对称Reformatsky型反应。在Ni（acac）2的催化下，手性α-溴丙酰基-2-恶唑烷二酮2与二乙基锌的金属-卤素交换反应形成的手性亚氨基烯酸锌烯醇盐，通过活化的α-进行不对称的锌-Reformatsky反应。 haloacetophenones 3，得到手性β羟基酰胺4以良好的收率和高比例顺式- （2- [R，3 - [R）异构体（高达> 97％）。这种新的不对称合成技术提供了一种实用的方法，可以合成用于三唑类抗真菌剂（如伏立康唑，拉伏康唑，TAK-187和RO-0094815）的通用手性构件5。

  DOI：

  10.1016/j.tetasy.2007.03.015

文献信息

• Orally active azole derivatives
  申请人：J. Uriach & Cia. S.A.

  公开号：US05478826A1

  公开（公告）日：1995-12-26

  The present invention relates to new orally active azole derivatives with antifungal activity of formula I ##STR1## wherein: X is CH or N; Ar represents phenyl substituted with halogen and/or trifluoromethyl; Z is --C(=O)-- or --SO.sub.2 --; R.sub.1 is CN, CO.sub.2 H, CO.sub.2 R.sub.7, CONR.sub.8 R.sub.9 or CH.sub.2 Y and then R.sub.3 is hydrogen, or R.sub.1 together with R.sub.3 forms a ring of formula I' ##STR2## wherein B is O, hydroxy or hydrogen; R.sub.4 is C.sub.1-4 alkyl; R.sub.5, R.sub.6, R.sub.8 and R.sub.9 are hydrogen or C.sub.1-4 alkyl; Y is --OH, --OR.sub.7, --OC(=O)R.sub.7, --NR.sub.8 R.sub.9, --NHC(=O)OR.sub.7 ; R.sub.7 is C.sub.1 -C.sub.4 -alkyl, phenyl-C.sub.1 -C.sub.4 -alkyl or optionally substituted phenyl; when Z is --C(=O)--, R.sub.2 is optionally susbtituted phenyl, or naphtyl; when Z is --SO.sub.2 --, R.sub.2 is C.sub.1-4 alkyl, phenyl-C.sub.1-4 -alkyl or optionally susbtituted phenyl.

  本发明涉及具有抗真菌活性的新口服活性唑类衍生物，其化学式为I 其中：X为CH或N；Ar代表用卤素和/或三氟甲基取代的苯基；Z为--C(=O)--或--SO.sub.2--；R.sub.1为CN、CO.sub.2 H、CO.sub.2 R.sub.7、CONR.sub.8 R.sub.9或CH.sub.2Y，然后R.sub.3为氢，或R.sub.1与R.sub.3一起形成化学式I'的环 其中B为O、羟基或氢；R.sub.4为C.sub.1-4烷基；R.sub.5、R.sub.6、R.sub.8和R.sub.9为氢或C.sub.1-4烷基；Y为--OH、--OR.sub.7、--OC(=O)R.sub.7、--NR.sub.8 R.sub.9、--NHC(=O)OR.sub.7；R.sub.7为C.sub.1-C.sub.4-烷基、苯基-C.sub.1-C.sub.4-烷基或可选择取代的苯基；当Z为--C(=O)--时，R.sub.2为可选择取代的苯基或萘基；当Z为--SO.sub.2--时，R.sub.2为C.sub.1-4烷基、苯基-C.sub.1-4-烷基或可选择取代的苯基。
• EP0617031B1
  申请人：——

  公开号：EP0617031B1

  公开（公告）日：1998-09-16
• US5478826A
  申请人：——

  公开号：US5478826A

  公开（公告）日：1995-12-26
• Asymmetric zinc-Reformatsky reaction of Evans chiral imide with acetophenones and its application to the stereoselective synthesis of triazole antifungal agents
  作者：Luo-Ting Yu、Meng-Tsung Ho、Ching-Yao Chang、Teng-Kuei Yang

  DOI：10.1016/j.tetasy.2007.03.015

  日期：2007.5

  Reformatsky-type reaction of Evans chiral imide with various acetophenones was studied. The chiral imido zinc enolate, which was formed through the metal–halogen exchange reaction of chiral α-bromopropionyl-2-oxazolidinones 2 with diethyl zinc under the catalysis of Ni(acac)2, performed the asymmetric zinc-Reformatsky reaction with activated α-haloacetophenones 3 to give the chiral β-hydroxyamide 4 in good

  研究了Evans手性酰亚胺与各种苯乙酮的Ni（acac）2催化ZnEt 2介导的不对称Reformatsky型反应。在Ni（acac）2的催化下，手性α-溴丙酰基-2-恶唑烷二酮2与二乙基锌的金属-卤素交换反应形成的手性亚氨基烯酸锌烯醇盐，通过活化的α-进行不对称的锌-Reformatsky反应。 haloacetophenones 3，得到手性β羟基酰胺4以良好的收率和高比例顺式- （2- [R，3 - [R）异构体（高达> 97％）。这种新的不对称合成技术提供了一种实用的方法，可以合成用于三唑类抗真菌剂（如伏立康唑，拉伏康唑，TAK-187和RO-0094815）的通用手性构件5。
• Aldol Condensation of Evans Chiral Enolates with Acetophenones. Its Application to the Stereoselective Synthesis of Homochiral Antifungal Agents
  作者：Javier Bartroli、Enric Turmo、Jordi Belloc、Javier Forn

  DOI：10.1021/jo00115a014

  日期：1995.5

  The results of the aldol condensation of Evans chiral imide enolates with a series of acetophenones are reported. Activated acetophenones, such as 2,4-difluoroacetophenone, alpha-chloroacetophenone, and alpha-chloro- and alpha-bromo-2,4-difluoroacetophenone, reacted with the lithium enolate of 5 with good levels of enolate facial diastereoselectivity toward the (2R)-isomers (> 10:1) but with low anti:syn selectivity (ca. 3:2). Sodium and potassium enolates of 5 were also tested. The nature of the solvent influenced the degree of diastereofacial biases. Less activated ketones, such as acetophenone, reacted only to a ca. 50% extent without facial or anti:syn stereoselectivities. Chairlike pericyclic transition states are believed to govern the reaction. When alpha-bromoacetophenones were used, longer reaction times and higher temperatures resulted in the selective formation of the S-2 epoxide (syn-(2R,3R), 11) with good levels of selectivity. Equilibration studies performed in THF with the corresponding metal aldolates generated in situ by deprotonation of the aldol adducts indicated that an aldol/retroaldol process was first established followed by a slower formation of the epoxide. Stereoselection is thought to originate by a faster oxirane formation of the syn bromohydrins as compared to the anti due to steric interactions between the alpha-group and the leaving bromide. Optimum retroaldol-epoxide formation rates were obtained using the sodium enolate in ether at -78 degrees C. Under these conditions the S-1:S-2:A(1)A(2) ratio of epoxides was 6:83:10:0.3 and the major isomer was isolated by recrystallization in 79% yield. An improved synthesis of amino alcohol 3, an advanced intermediate in the preparation of orally active antifungal agents, using a tandem of this new ketone-aldol technology and a Curtius rearrangement, is reported. The new sequence proceeds with an overall yield of 53% and does not require chromatographic purifications.