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- In synthetic chemistry, the longest linear sequence, commonly abbreviated as LLS, is the largest number of reactions required to go from the starting materials to the products in a multistep sequence. This concept is very important when trying to optimize a synthetic plan. Since every reaction step can decrease the yield of the product, reducing the value of the LLS is a good way to increase the quantity of chemicals formed at the end: this can be done by devising quicker methods to couple the fragments or by introducing convergence. However, improving sequences which are not the longest linear one will generally not produce an overall enhancement to the yield of the reaction since the benefits incur in intermediates that were already present in excess, assuming that the yields for each of the steps are roughly equal. (en)
- 合成化学において、最長直線工程(さいちょうちょくせんこうてい、英: Longest linear sequence、略称: LLS)は、多段階工程において出発物質から始まって目的物になるのに必要な反応の最大数である。 この概念は合成計画の最適化を試みる時に非常に重要である。全ての反応段階は目的物の収率を低下させるため、LLSの値を減らすことは最後に得られる化学物質の量を増やすためのよいやり方である。これは収束的合成を用いることで行うことができる。 (ja)
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- 合成化学において、最長直線工程(さいちょうちょくせんこうてい、英: Longest linear sequence、略称: LLS)は、多段階工程において出発物質から始まって目的物になるのに必要な反応の最大数である。 この概念は合成計画の最適化を試みる時に非常に重要である。全ての反応段階は目的物の収率を低下させるため、LLSの値を減らすことは最後に得られる化学物質の量を増やすためのよいやり方である。これは収束的合成を用いることで行うことができる。 (ja)
- In synthetic chemistry, the longest linear sequence, commonly abbreviated as LLS, is the largest number of reactions required to go from the starting materials to the products in a multistep sequence. This concept is very important when trying to optimize a synthetic plan. Since every reaction step can decrease the yield of the product, reducing the value of the LLS is a good way to increase the quantity of chemicals formed at the end: this can be done by devising quicker methods to couple the fragments or by introducing convergence. However, improving sequences which are not the longest linear one will generally not produce an overall enhancement to the yield of the reaction since the benefits incur in intermediates that were already present in excess, assuming that the yields for each of (en)
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- 最長直線工程 (ja)
- Longest linear sequence (en)
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