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Synthesis of 3,3-dimethoxy-2-aryl-2,3-dihydro-1-oxa-cyclopenta[l]phenanthren-2-ols and their conversion to 2(3H)- and 3(2H)-furanones
被引:6
|作者:
Jacob, AM
[1
]
Thumpakkara, RK
[1
]
Prathapan, S
[1
]
Jose, B
[1
]
机构:
[1] Cochin Univ Sci & Technol, Dept Appl Chem, Cochin 682022, Kerala, India
来源:
关键词:
furanol;
furanone;
phenanthrenequinone;
rearrangement;
D O I:
10.1016/j.tet.2005.03.011
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
A number of new 3,3-dimethoxy-2-aryl-2,3-dihydro-1-oxacyclopenta[I]phenanthren-2-ols were synthesized by the base-catalyzed reaction between phenanthrenequinone and 4-substituted acetophenones in methanol. These furanols are unstable and are easily converted to stable 3-methoxy-3-aryl-3H-1-oxacyclopenta[I]phenathren-2-ones in excellent yields. The furanols are converted to 2-aryl-1-oxacyclopenta[I]phenanthren-3-ones on treatment with acids. Plausible mechanisms for some of these new transformations are proposed. (c) 2005 Elsevier Ltd. All rights reserved.
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页码:4601 / 4607
页数:7
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