| 词条 | Convergent synthesis |
| 释义 |
In chemistry a convergent synthesis is a strategy that aims to improve the efficiency of multistep synthesis, most often in organic synthesis. In this type of synthesis several individual pieces of a complex molecule are synthesized in stage one, and then in stage two these pieces are combined to form the final product.[1] In linear synthesis the overall yield quickly drops with each reaction step: A → B → C → D Suppose the yield is 50% for each reaction; the overall yield of D is only 12.5% from A. In a convergent synthesis A → B (50%) C → D (50%) B + D → E (25%) the overall yield of E (25%) looks much better. Convergent synthesis is applied in the synthesis of complex molecules and involves fragment coupling and independent synthesis. Examples:
See also
References1. ^Organic Synthesis, 3rd Ed. 2010 Michael Smith {{chemical synthesis}}2. ^Convergent Synthesis of Internally Branched PAMAM Dendrimers Michael Pittelkow, Jrn B. Christensen Org. Lett., 7 (7), 1295–1298, 2005 3. ^Total Synthesis and Revised Structure of Biyouyanagin A K. C. Nicolaou, David Sarlah, and David M. Shaw Angew. Chem. Int. Ed. 2007, 46, 4708–4711 {{DOI|10.1002/anie.200701552}} 1 : Chemical synthesis |
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