1,2-Additions of silylenol ethers to 4-silyloxy-1-benzothiopyrylium triflates: A new and efficient method for the synthesis of 2-substituted benzothiopyran-4-ones

被引：0
作者：
Beifuss, U
Tietze, M
Gehm, H
机构：
来源：
SYNLETT | 1996年 / 02期
关键词：
1-benzothiopyrylium triflates; silylenol ether; 1,2-addition; 1,4-addition; S-heterocycles;
D O I：
10.1055/s-1996-5339
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
The regioselective 1,2-addition of silylenol ethers to the C=S+-bond of 4-silyloxy-1-benzothiopyrylium triflates yields the corresponding bis-silylenol ethers which can be hydrolyzed selectively to give the respective ketosilylenol ethers or 1,5-diketones. The new method is an equivalent to the 1,4-addition of nucleophiles to beta-thio-alpha,beta-unsaturated cyclic ketones.
引用
收藏
页码：182 / 184
页数：3
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