The Enantioselective Synthesis of 3‐Methoxy‐1, 3, 5 (10)‐estratrien‐11, 17‐dione by a Thermal Intramolecular Cycloaddition Reaction. Preliminary communication
The Enantioselective Synthesis of 3‐Methoxy‐1, 3, 5 (10)‐estratrien‐11, 17‐dione by a Thermal Intramolecular Cycloaddition Reaction. Preliminary communication
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通过热分子内环加成反应对映选择性合成 3-甲氧基-1, 3, 5 (10)-雌三烯-11, 17-二酮。
DOI:
10.1002/hlca.19780610535
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发表时间:
1978
期刊:
影响因子:
--
通讯作者:
M. Petrzilka
中科院分区:
文献类型:
--
作者:
W. Oppolzer;K. Bättig;M. Petrzilka
The enantiomerically pure (+)-3-methoxy-1, 3, 5 (10)-estratrien-11, 17-dione 11 (with trans-anti-trans configuration) was synthesized in a highly stereocontrolled fashion from (±)-t-butyl 4-methoxy-1-benzocyclobutene carboxylate (8) and the (+)-carboxylic acid 6, obtained from 4 in two steps, followed by one crystallization of the (+)-ephedrine salt. The key step 1011(Scheme 2) involves a thermal intramolecular cycloaddition reaction.