{"id":1740046,"date":"2025-09-03T17:55:31","date_gmt":"2025-09-03T12:25:31","guid":{"rendered":"https:\/\/pharmint.net\/?post_type=encyclopedia&p=1740046"},"modified":"2025-09-03T17:55:31","modified_gmt":"2025-09-03T12:25:31","slug":"route-of-synthesis","status":"publish","type":"encyclopedia","link":"https:\/\/pharmint.net\/zh\/glossary\/route-of-synthesis\/","title":{"rendered":"Route of Synthesis"},"content":{"rendered":"

What Is the Route of Synthesis?<\/strong><\/h2>\n

A Route of Synthesis<\/strong> (ROS) is a detailed, step-by-step pathway—a sequence of chemical reactions, conditions, and intermediate compounds—used to produce a target molecule like an API <\/a>or fine chemical<\/a>. It defines how starting materials are transformed into the final product.<\/p>\n

Why Is the Route of Synthesis Important in Pharmaceutical Development?<\/strong><\/h2>\n

The ROS is foundational to drug development because it affects efficiency, yield, safety, scalability, cost, and environmental impact<\/strong>. A well-designed synthetic route streamlines manufacture, supports regulatory compliance, and is central to process optimization and sustainability.<\/p>\n

How Is an Optimal Route of Synthesis Designed?<\/strong><\/h2>\n
    \n
  • Retrosynthetic Analysis<\/strong>: Works backward from the target molecule to identify simpler precursors.<\/li>\n
  • Process Chemistry Criteria<\/strong>: Chemists assess atom economy, step count, material cost, environmental impact (e.g., E-factor), and reactor efficiency (VTO).<\/li>\n
  • Route Scouting (SELECT Principles)<\/strong>: Routes are evaluated for Safety<\/strong>, Environmental impact<\/strong>, Legal\/IP constraints<\/strong>, Economics<\/strong>, Control<\/strong>, and Throughput<\/strong>.<\/li>\n<\/ul>\n

    What Are Real-World Applications of the Route of Synthesis?<\/strong><\/h2>\n
      \n
    • Process Development<\/strong>: Transitioning from lab-scale to kilogram‑scale API production requires evaluation for cost, safety, and regulatory feasibility.<\/li>\n
    • Synthetic Route Optimization<\/strong>: Vitamin C manufacture was reduced from six steps to three, demonstrating efficiency gains and significant cost savings.<\/li>\n
    • Drug Pipeline Planning<\/strong>: Early evaluation of multiple ROS helps inform scalable and robust drug development strategies.<\/li>\n<\/ul>\n

      Related Terms <\/strong><\/h2>\n
        \n
      • Retrosynthetic Analysis (Tool for planning routes)<\/strong>
        \n<\/strong><\/li>\n
      • Process Chemistry & Scale-Up<\/strong>
        \n<\/strong><\/li>\n
      • Atom Economy, VTO, Environmental Factor (E-factor)<\/strong>
        \n<\/strong><\/li>\n
      • GMP-Compatible Route Development<\/strong>
        \n<\/strong><\/li>\n
      • Convergent vs. Linear Synthesis<\/strong>
        \n<\/strong><\/li>\n
      • Semisynthesis (using natural precursors)<\/strong><\/li>\n<\/ul>\n

        Route of Synthesis FAQs<\/strong><\/h2>\n

        How is retrosynthesis used in route synthesis?<\/strong><\/h4>\n

        Retrosynthesis deconstructs the target molecule into simpler precursors to plan an efficient, feasible synthetic route.<\/p>\n

        What criteria guide process chemists in route selection?<\/strong><\/h4>\n

        Process chemists consider atom economy, reactor efficiency (VTO), material cost, environmental impact (E-factor), and scalability.<\/p>\n

        Why was the vitamin C route optimized?<\/strong><\/h4>\n

        An improved ROS reduced steps from six to three, dramatically improving yield, cost-efficiency, and sustainability.<\/p>\n

        What does SELECT stand for in route scouting?<\/strong><\/h4>\n

        SELECT refers to evaluating routes based on Safety, Environment, Legal\/IP, Economic viability, Control, and Throughput.<\/p>\n

        What is semisynthesis?<\/strong><\/h4>\n

        Semisynthesis uses complex natural precursor molecules and then chemically modifies them, providing cost-effective access to complex drug structures.<\/p>\n","protected":false},"author":7806,"template":"","meta":{"rank_math_lock_modified_date":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}}},"encyclopedia-tag":[1343,1341,1340,1339,1342,1337,1338],"class_list":["post-1740046","encyclopedia","type-encyclopedia","status-publish","hentry","encyclopedia-tag-api-synthesis-route","encyclopedia-tag-atom-economy","encyclopedia-tag-process-chemistry","encyclopedia-tag-retrosynthesis","encyclopedia-tag-route-development","encyclopedia-tag-route-of-synthesis","encyclopedia-tag-synthetic-route-pharma"],"_links":{"self":[{"href":"https:\/\/pharmint.net\/zh\/wp-json\/wp\/v2\/encyclopedia\/1740046","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pharmint.net\/zh\/wp-json\/wp\/v2\/encyclopedia"}],"about":[{"href":"https:\/\/pharmint.net\/zh\/wp-json\/wp\/v2\/types\/encyclopedia"}],"author":[{"embeddable":true,"href":"https:\/\/pharmint.net\/zh\/wp-json\/wp\/v2\/users\/7806"}],"wp:attachment":[{"href":"https:\/\/pharmint.net\/zh\/wp-json\/wp\/v2\/media?parent=1740046"}],"wp:term":[{"taxonomy":"encyclopedia-tag","embeddable":true,"href":"https:\/\/pharmint.net\/zh\/wp-json\/wp\/v2\/encyclopedia-tag?post=1740046"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}