The use of environmental metrics to evaluate green chemistry improvements to the synthesis of (S,S)-reboxetine succinate
作者:Georges Assaf、Graham Checksfield、Doug Critcher、Peter J. Dunn、Stuart Field、Laurence J. Harris、Roger M. Howard、Gemma Scotney、Adam Scott、Suju Mathew、Geoffrey M. H. Walker、Alexander Wilder
DOI:10.1039/c1gc15921f
日期:——
The Pfizer Green Chemistry metrics program is described and exemplified with a case history involving the synthesis of (S,S)-reboxetine succinate. The initial route used a classical resolution approach and generated high levels of waste. This route was replaced by an enantiospecific synthesis which used Sharpless epoxidation chemistry, an enzymatic process to selectively protect a primary alcohol and a new efficient method of chiral morpholine construction as key steps. These improvements reduced the levels of waste produced by the synthesis by more than 90%. Detailed metrics starting from a common starting material (trans-cinnamyl alcohol) for all routes of synthesis are presented.
辉瑞绿色化学指标项目进行了描述,并通过一个案例研究展示了(S,S)-雷博西丁琥珀酸的合成。最初的合成路径采用传统的分离方法,产生了大量废物。随后,该路径被一种对映选择性合成所取代,该合成采用了Sharpless环氧化反应、选择性保护原料醇的酶促反应以及一种新的高效手性莫菲林构建方法作为关键步骤。这些改进使得合成过程中产生的废物减少了90%以上。详细的指标从所有合成路径的共同起始原料(反式肉桂醇)出发进行了呈现。