An unusual stereochemical outcome of radical cyclization: synthesis of (+)-biotin
An unusual stereochemical outcome of radical cyclization: synthesis of (+)-biotin
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DOI:
10.1016/j.tet.2005.07.070
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发表时间:
2005-09-26
期刊:
影响因子:
2.1
通讯作者:
Deshpande, VH
中科院分区:
文献类型:
--
作者:
Chavan, SP;Chittiboyina, AG;Deshpande, VH
An enantioselective synthesis of (+)-biotin 1 starting from naturally available cysteine is described. The key steps are the unusual stereochemical outcome of radical cyclization of compound 10 to prepare 5,5-fused system 11, and the introduction of C4-sidechain at C-6 in 13 via a Grignard reaction. (c) 2005 Elsevier Ltd. All rights reserved.