ortho-Formylation of estrogens. Synthesis of the anti-cancer agent 2-methoxyestradiol
作者:Øyvind W. Akselsen、Trond Vidar Hansen
DOI:10.1016/j.tet.2011.08.005
日期:2011.10
Several estrogens were mono-formylated using a mixture of paraformaldehyde. MgCl2, and Et3N in refluxing THF. In all cases, the 2-isomer was formed as the major product with high regioselectivity compared to the 4-isomer. Excellent to high yields were obtained in all examples except one. The method was applied for an efficient synthesis of the anti-cancer agent 2-methoxyestradiol. (C) 2011 Elsevier Ltd. All rights reserved.
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