CYCLIZATION OF UNSATURATED MONOTERPENIC ALCOHOLS MEDIATED BY THALLIUM-(III) SALTS

被引:26
作者
FERRAZ, HMC [1 ]
RIBEIRO, CMR [1 ]
GRAZINI, MVA [1 ]
BROCKSOM, TJ [1 ]
BROCKSOM, U [1 ]
机构
[1] UFSCAR,DEPT QUIM,BR-13560 SAO CARLOS,SP,BRAZIL
基金
巴西圣保罗研究基金会;
关键词
D O I
10.1016/S0040-4039(00)76741-4
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
The reaction of thallium triacetate and thallium trinitrate with four monoterpenic unsaturated alcohols (isopulegol, neo-isopulegol, cis-carveol and alpha-terpineol), in AcOH:H2O, (1:1, vol/vol) as solvent, led to the corresponding beta-hydroxy-cyclic ethers with high regio- and stereoselectivity, in moderate to good yields. A mechanism of ring-contraction or ring-expansion of the oxythallated adduct is proposed, based on the substitution patterns of each double bond.
引用
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页码:1497 / 1500
页数:4
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