(6R,7R)-tert-butyl 3-(hydroxymethyl)-8-oxo-7-(2-phenylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 5-oxide | 1208121-86-1

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 内酰胺类
• 英文名称: (6R,7R)-tert-butyl 3-(hydroxymethyl)-8-oxo-7-(2-phenylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 5-oxide
• 英文别名: tert-butyl (6R,7R)-3-(hydroxymethyl)-5,8-dioxo-7-[(2-phenylacetyl)amino]-5lambda4-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate；tert-butyl (6R,7R)-3-(hydroxymethyl)-5,8-dioxo-7-[(2-phenylacetyl)amino]-5λ4-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate
• CAS: 1208121-86-1
• 化学式: C₂₀H₂₄N₂O₆S
• 分子量: 420.486
• InChiKey: IFRLHQVJDVMEKH-WYCOYDAZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.5
• 重原子数：
  29
• 可旋转键数：
  7
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.45
• 拓扑面积：
  132
• 氢给体数：
  2
• 氢受体数：
  7

反应信息

• 作为产物：
  描述：

  (6R,7R)-tert-butyl 3-(acetoxymethyl)-8-oxo-7-(2-phenylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 5-oxide 在 Candida antarctica lipase B 作用下， 以 四氢呋喃 、 正己烷 、 仲丁醇 为溶剂， 反应 96.0h， 以70%的产率得到(6R,7R)-tert-butyl 3-(hydroxymethyl)-8-oxo-7-(2-phenylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 5-oxide
  参考文献：
  名称：

  Enzymatic Deprotection of the Cephalosporin 3′-Acetoxy Group Using Candida antarctica Lipase B

  摘要：

  Cephalosporins remain one of the most important classes of antibiotics. A useful site for derivatization involves generation of and chemistry at the 3'-hydroxymethyl position. While 3'-acetoxymethyl-substituted cephalosporins are readily available, deacetylation to access the free 3'-hydroxymethyl group is problematic when the carboxylic acid is protected as an ester. Herein we report that this important transformation has been efficiently accomplished using Candida antarctica lipase B. Although this transformation is difficult to carry out using chemical methods, the enzymatic deacetylation has been successful on gram scale, when the cephalosporin is protected as either the benzhydryl or tert-butyl esters and on the corresponding sulfoxide and sulfone of the tert-butyl ester.

  DOI：

  10.1021/jo902406b

文献信息

• Enzymatic Deprotection of the Cephalosporin 3′-Acetoxy Group Using <i>Candida antarctica</i> Lipase B
  作者：Leslie D. Patterson、Marvin J. Miller

  DOI：10.1021/jo902406b

  日期：2010.2.19

  Cephalosporins remain one of the most important classes of antibiotics. A useful site for derivatization involves generation of and chemistry at the 3'-hydroxymethyl position. While 3'-acetoxymethyl-substituted cephalosporins are readily available, deacetylation to access the free 3'-hydroxymethyl group is problematic when the carboxylic acid is protected as an ester. Herein we report that this important transformation has been efficiently accomplished using Candida antarctica lipase B. Although this transformation is difficult to carry out using chemical methods, the enzymatic deacetylation has been successful on gram scale, when the cephalosporin is protected as either the benzhydryl or tert-butyl esters and on the corresponding sulfoxide and sulfone of the tert-butyl ester.