A NEW APPROACH TO THE CONSTRUCTION OF BETA-ALKOXY-SUBSTITUTED CYCLIC ETHERS VIA THE INTRAMOLECULAR CYCLIZATION OF OMEGA-TRIALKYLPLUMBYL AND OMEGA-TRIALKYLSTANNYL ETHER ACETALS

被引:52
作者
YAMADA, J [1 ]
ASANO, T [1 ]
KADOTA, I [1 ]
YAMAMOTO, Y [1 ]
机构
[1] TOHOKU UNIV,FAC SCI,DEPT CHEM,SENDAI,MIYAGI 980,JAPAN
关键词
D O I
10.1021/jo00312a003
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
: The w-trialkylplumbyl ether acetal (la) gave the β-alkoxy cyclic ether (2a) upon treatment with 2 equiv of TiCl4in CH2C12. The reaction of the ω-trialkylstannyl ether acetals 3, 4, and 5 in the presence of 2 equiv of TiCl3 (OiPr) in CH2C12 produced the corresponding 0-alkoxy- a-vinyl cyclic ethers 6, 7, and 8, respectively. This new procedure permitted the chiral synthesis of a fundamental structural unit (20) of cyclic ether natural products. © 1990, American Chemical Society. All rights reserved.
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页码:6066 / 6068
页数:3
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