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Chin. J. Org. Chem. ›› 2008, Vol. 28 ›› Issue (03): 511-514. Previous Articles Next Articles
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余婧,张稳稳,李映红,李盛男,何菱*
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YU Jing,ZHANG Wen-Wen,LI Ying-Hong,LI Sheng-Nan,HE Ling*
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The convenient enantioselective synthesis of nebivolol (1) was described. The key steps of this total synthesis were based on a Sharpless asymmetric epoxidation methodology employing 4-fluoro-2-(5- hydroxypent-3-enyl)phenol (2) as a substrate and the efficient formation of (2S,1R)-2-(2-amino-1-hydroxy ethyl)-6-fluorochroman (6) and (R,R)-6-fluoro-2-oxiranyl-chroman (10). Simultaneously, the approach was inves-tigated for the nucleophilic ring opening of epoxide 10. Finally, 10 was afforded in an ex-cellent yield and the ring cleavage of 10 led to the formation of 1 in a 14.1% overall yield over steps after optimization of the steps which accompanied a 2.1% overall yield in literature.
Key words: Sharpless asymmetric epoxidation, nebivolol, hypertensive agent
YU Jing,ZHANG Wen-Wen,LI Ying-Hong,LI Sheng-Nan,HE Ling*. Asymmetric Synthesis of Nebivolol[J]. Chin. J. Org. Chem., 2008, 28(03): 511-514.
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