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Efficient Rhodium-Catalyzed Conjugate Addition of Arylboronic Acids to Unsaturated Furano Esters for the Highly Stereoselective Synthesis of Four Natural Trisubstituted Furanolignans
被引:10
|作者:
Mondiere, Aurelie
[1
]
Pousse, Guillaume
[1
]
Bouyssi, Didier
[1
]
Balme, Genevieve
[1
]
机构:
[1] Univ Lyon 1, ICBMS, CNRS, UMR 5246,ESCPE Lyon, F-69622 Villeurbanne, France
关键词:
Lignans;
Rhodium;
Conjugate addition;
Boronic acids;
Microwave chemistry;
ELECTRON-DEFICIENT OLEFINS;
DIPOLAR APROTIC MEDIA;
ALPHA-CYANO ESTERS;
BETA-KETO-ESTERS;
ASYMMETRIC 1,4-ADDITION;
ORGANOBORONIC ACIDS;
MALONATE ESTERS;
LIGNANS;
NEOLIGNANS;
ARYL;
D O I:
10.1002/ejoc.200900643
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
Four natural lignans, (+/-)-dihydrosesamin (1a), (+/-)-lariciresinol methyl ether (1b), (+/-)-sanshodiol methyl ether (1c) and (+/-)-acuminatin methyl ether (1d), were prepared stereoselectively in five steps from a 4-(arylmethylene)-2-methoxy-tetrahydrofuran derivative obtained by a MCR reaction. The key step of this synthesis is the microwave-assisted stereoselective addition of a boronic acid (Hayashi-Miyaura reaction) to a 4-ethoxycarbonyldihydrofuran, generating three contiguous stereogenic centers with an excellent diastereoselectivity. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
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页码:4225 / 4229
页数:5
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