共 104 条
A [3+3] cyclization strategy for asymmetric synthesis of alkyl substituted piperidine-2-ones using 1,2-cyclic sulfamidates: a formal synthesis of (S)-coniine from L-norvaline
被引:14
作者:
Karanfil, Abdullah
[1
]
Balta, Berrin
[1
]
Eskici, Mustafa
[1
]
机构:
[1] Celal Bayar Univ, Fac Arts & Sci, Dept Chem, TR-45016 Mansa, Turkey
来源:
关键词:
Cyclic sulfamidates;
Lithium triethylorthopropiolate;
Cyclization;
Piperidines;
GLYCOSYL AMINO-ACIDS;
ENANTIOSELECTIVE SYNTHESIS;
STEREOSELECTIVE-SYNTHESIS;
EFFICIENT SYNTHESIS;
LACTAM PRECURSORS;
CYCLIC SULFAMATE;
FACILE ENTRY;
ALPHA;
REACTIVITY;
DERIVATIVES;
D O I:
10.1016/j.tet.2012.09.081
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
Regioselective ring-opening reactions of a set of representative 1,2-cyclic sulfamidates with lithium triethylorthopropiolate proceeded efficiently to deliver the corresponding delta-amino-alpha,beta-unsaturated esters after acidic hydrolysis. Hydrogenation of the unsaturated esters and subsequent thermal cyclization afforded the related alkyl substituted piperidine-2-ones. This approach represents a novel [3+3] cyclization strategy for the asymmetric synthesis of alkyl substituted piperidin-2-ones. Efficiency of the cyclization process is illustrated by a formal asymmetric synthesis of (S)-coniine from L-norvaline. (c) 2012 Elsevier Ltd. All rights reserved.
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页码:10218 / 10229
页数:12
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