Stereoselective Synthesis of 3-Alkyl-2-aryltetrahydrofuran-4-ols: Total Synthesis of (±)-Paulownin
摘要:
[GRAPHICS]A formal [3 + 2]-cycloaddition involving the Lewis acid mediated reaction of alpha-silyloxy aldehydes and styrenes to afford 3-alkyl-2-aryltetrahydrofuran-4-ols has been developed. This methodology was applied to the total synthesis of the naturally occurring furofuran lignan (+/-)-paulownin.
Stereoselective Synthesis of 3-Alkyl-2-aryltetrahydrofuran-4-ols: Total Synthesis of (±)-Paulownin
作者:Steven R. Angle、Inchang Choi、Fook S. Tham
DOI:10.1021/jo800901r
日期:2008.8.1
[GRAPHICS]A formal [3 + 2]-cycloaddition involving the Lewis acid mediated reaction of alpha-silyloxy aldehydes and styrenes to afford 3-alkyl-2-aryltetrahydrofuran-4-ols has been developed. This methodology was applied to the total synthesis of the naturally occurring furofuran lignan (+/-)-paulownin.
Stereoselective Synthesis of Tetrahydrofurans via Formal [3+2]-Cycloaddition of Aldehydes and Allylsilanes. Formal Total Synthesis of the Muscarine Alkaloids (−)-Allomuscarine and (+)-Epimuscarine
作者:Steven R. Angle、Nahla A. El-Said
DOI:10.1021/ja012193b
日期:2002.4.1
The stereoselectivesynthesis of tetrahydrofurans was achieved by formal [3+2]-cycloaddition of allyl and crotylsilanes with alpha-triethylsilyloxy aldehydes. The scope of the reaction was examined by using different alpha-substituted aldehydes and different substituents on the silicon. Tamao oxidation of the products resulted in formation of diols that are easily functionalized allowing an entry to